{"id":255,"date":"2023-07-10T08:56:34","date_gmt":"2023-07-10T08:56:34","guid":{"rendered":"https:\/\/mathority.org\/pt\/distancia-entre-duas-linhas-no-espaco-em-r3\/"},"modified":"2023-07-10T08:56:34","modified_gmt":"2023-07-10T08:56:34","slug":"distancia-entre-duas-linhas-no-espaco-em-r3","status":"publish","type":"post","link":"https:\/\/mathority.org\/pt\/distancia-entre-duas-linhas-no-espaco-em-r3\/","title":{"rendered":"Dist\u00e2ncia entre duas linhas no espa\u00e7o (em r3)"},"content":{"rendered":"<p>Nesta p\u00e1gina voc\u00ea descobrir\u00e1 como \u00e9 calculada a dist\u00e2ncia entre duas retas no espa\u00e7o (em R3), qualquer que seja o seu tipo (retas paralelas, secantes, coincidentes, secantes, perpendiculares, etc.). Al\u00e9m disso, voc\u00ea poder\u00e1 ver exemplos e exerc\u00edcios resolvidos passo a passo. <\/p>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-104\"><\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"como-calcular-la-distancia-entre-dos-rectas\"><\/span> Como calcular a dist\u00e2ncia entre duas linhas <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-105\"><\/div>\n<\/div>\n<p> A dist\u00e2ncia entre duas linhas \u00e9 a dist\u00e2ncia m\u00ednima entre qualquer ponto de uma linha e qualquer ponto da outra linha. Esta dist\u00e2ncia corresponde ao comprimento do segmento que vai de uma reta a outra reta e que, ao mesmo tempo, \u00e9 perpendicular a ambas as retas. <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/uploads\/2023\/07\/distance-entre-deux-lignes-dans-lespace-2.webp\" alt=\"dist\u00e2ncia entre duas linhas no espa\u00e7o (em R3)\" class=\"wp-image-3056\" width=\"387\" height=\"297\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<\/div>\n<p> Portanto, encontrar a dist\u00e2ncia entre duas linhas diferentes no espa\u00e7o tridimensional (3D) depende da posi\u00e7\u00e3o relativa entre elas:<\/p>\n<ul>\n<li> Se as duas retas <strong>coincidem<\/strong> ou <strong>se cruzam<\/strong> , a dist\u00e2ncia entre as duas retas \u00e9 zero, porque elas se cruzam (pelo menos) em um ponto.<\/li>\n<li> Quando as duas retas s\u00e3o <strong>paralelas<\/strong> , precisamos pegar qualquer ponto de uma das retas e calcular a dist\u00e2ncia entre esse ponto e a outra reta (abaixo voc\u00ea tem um exemplo de como fazer isso).<\/li>\n<li> Se as duas linhas <strong>se cruzam<\/strong> no espa\u00e7o, precisamos aplicar a f\u00f3rmula para a dist\u00e2ncia entre duas linhas que se cruzam (veja abaixo uma explica\u00e7\u00e3o detalhada).<\/li>\n<\/ul>\n<p> Portanto, para calcular a dist\u00e2ncia entre duas retas, primeiro voc\u00ea deve saber que tipo de reta s\u00e3o e depois, dependendo do caso, usar uma f\u00f3rmula ou outra. Portanto, \u00e9 importante que voc\u00ea j\u00e1 domine <a href=\"https:\/\/mathority.org\/pt\/posicao-relativa-de-duas-linhas-no-espaco-r3-exemplos-de-exercicios-resolvidos\/\">como encontrar a posi\u00e7\u00e3o relativa de duas linhas no espa\u00e7o<\/a> antes de continuar, mas se n\u00e3o lembra como foi feito no link ver\u00e1 uma explica\u00e7\u00e3o bem completa al\u00e9m de exemplos e exerc\u00edcios resolvidos passo a passo. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"como-hallar-la-distancia-entre-dos-rectas-paralelas-en-el-espacio\"><\/span> Como encontrar a dist\u00e2ncia entre duas linhas paralelas no espa\u00e7o <span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-106\"><\/div>\n<\/div>\n<p> O c\u00e1lculo da dist\u00e2ncia entre duas retas paralelas no espa\u00e7o (em R3) \u00e9 feito da mesma forma que no plano (em R2): <strong>voc\u00ea deve pegar um ponto em qualquer uma das duas retas e encontrar a dist\u00e2ncia desse ponto na outra linha.<\/strong> <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/uploads\/2023\/07\/distance-entre-un-point-et-une-ligne-en-ligne.webp\" alt=\"dist\u00e2ncia entre duas linhas paralelas no espa\u00e7o\" class=\"wp-image-1960\" width=\"425\" height=\"361\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<\/div>\n<div style=\"background-color:#FFCC8080;padding-top: 20px; padding-bottom: 0.5px; padding-right: 30px; padding-left: 30px; border: 2px solid #FFB74D; border-radius:20px;\">\n<p style=\"text-align:left\"> Assim, a f\u00f3rmula para calcular a dist\u00e2ncia de um ponto a uma reta em 3 dimens\u00f5es (e que \u00e9 usada para determinar a dist\u00e2ncia entre duas retas paralelas) \u00e9:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-7c7a838a254403e912767fb131474703_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(s,r)=d(P,r)=\\cfrac{\\lvert \\vv{QP} \\times \\vv{\\text{v}}_r \\rvert}{\\lvert \\vv{\\text{v}}_r \\rvert}\" title=\"Rendered by QuickLaTeX.com\" height=\"45\" width=\"225\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p style=\"text-align:left; margin-bottom:4px\"> Ouro:<\/p>\n<ul>\n<li>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-74f213a2a0ca1a22659ce06a80bc5d07_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lvert \\vv{\\text{v}}_r \\rvert\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"23\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u00e9 a magnitude do vetor de dire\u00e7\u00e3o da linha<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-aa03a29f511592c1a1ecc8b306b0cf0d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"r.\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<\/li>\n<li>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-2c758bec4c272382411b95fc0e7ee250_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Q\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"14\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 um ponto na linha<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-42ca8c420951296e93092e708435813a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"r,\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: -4px;\"><\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-650eb7688af6737ac325425b5c9a5982_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"><\/p>\n<p> um ponto na linha<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-ae1901659f469e6be883797bfd30f4f8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"8\" style=\"vertical-align: 0px;\"><\/p>\n<p> E<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-fdca087897cc5ad573be7ce2b595dfb3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{QP}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"28\" style=\"vertical-align: -4px;\"><\/p>\n<p> o vetor definido pelos dois pontos<\/li>\n<li>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-de23c83cb189398d246990817a7e83db_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lvert \\vv{QP} \\times \\vv{\\text{v}}_r \\rvert\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"72\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u00e9 a magnitude do produto vetorial entre os vetores<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-fdca087897cc5ad573be7ce2b595dfb3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{QP}\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"28\" style=\"vertical-align: -4px;\"><\/p>\n<p> E<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-50f32076ae1ee85f5b7c5a6d43a03089_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{\\text{v}}_r\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"15\" style=\"vertical-align: -3px;\"><\/p>\n<\/li>\n<\/ul>\n<\/div>\n<p> Como exemplo, vamos resolver um problema de dist\u00e2ncia entre 2 retas paralelas no espa\u00e7o:<\/p>\n<ul>\n<li> Qual \u00e9 a dist\u00e2ncia entre as duas linhas paralelas a seguir? <\/li>\n<\/ul>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-109\"><\/div>\n<\/div>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-43cb370e9b16d006262ec6893e02dc92_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"r: \\ (x,y,z) = (2,1,1) + t(-1,3,2)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"264\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-48307ac3d4d0b23d6816a7473b6b1c0f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s: \\ (x,y,z) = (-2,4,1) + t(2,-6,-4)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"292\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p> Ambas as retas s\u00e3o expressas na forma de uma equa\u00e7\u00e3o vetorial, portanto, podemos facilmente descobrir o vetor diretor e um ponto de cada uma delas:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-91c721e906a848c6c129721fe7908112_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle r : \\ \\begin{cases}\\vv{\\text{v}}_r=(-1,3,2) \\\\[1.7ex] Q(2,1,1) \\end{cases} \\qquad \\qquad s: \\ \\begin{cases}\\vv{\\text{v}}_s=(2,-6,-4) \\\\[1.7ex] P(-2,4,1) \\end{cases}\" title=\"Rendered by QuickLaTeX.com\" height=\"65\" width=\"417\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Se voc\u00ea tiver alguma d\u00favida sobre como determinar o vetor diretor e um ponto de uma reta, recomendamos que voc\u00ea d\u00ea uma olhada na explica\u00e7\u00e3o da <a href=\"https:\/\/mathority.org\/pt\/equacoes-de-linha-todas-as-formulas-exemplos-exercicios-resolvidos\/\">equa\u00e7\u00e3o da reta<\/a> . L\u00e1 explicamos isso para todas as equa\u00e7\u00f5es da reta, pois encontrar o vetor diretor e um ponto que pertence a uma reta depende do tipo de equa\u00e7\u00e3o em que a reta \u00e9 expressa.<\/p>\n<p> Agora, para encontrar a dist\u00e2ncia entre as duas retas paralelas, precisamos aplicar a f\u00f3rmula da dist\u00e2ncia de um ponto a uma reta:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-7c7a838a254403e912767fb131474703_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(s,r)=d(P,r)=\\cfrac{\\lvert \\vv{QP} \\times \\vv{\\text{v}}_r \\rvert}{\\lvert \\vv{\\text{v}}_r \\rvert}\" title=\"Rendered by QuickLaTeX.com\" height=\"45\" width=\"225\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p> Ent\u00e3o por um lado calculamos o m\u00f3dulo do vetor resultante do produto vetorial. Se tiver d\u00favidas sobre como \u00e9 calculado, pode consultar a <a href=\"https:\/\/mathority.org\/pt\/produto-vetorial-de-dois-vetores-exemplos-de-formulas-cruzadas-exercicios-resolvidos\/\">f\u00f3rmula do produto vetorial<\/a> , onde, al\u00e9m disso, poder\u00e1 ver exemplos e exerc\u00edcios resolvidos desta opera\u00e7\u00e3o entre vetores. <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dadf92e90a88ce334cf34bce072e5457_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{QP} = Q - P = (2,1,1)-(-2,4,1) = (4,-3,0)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"365\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-f166cb84d794adae8b8e5678790a5ad8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{QP} \\times \\vv{\\text{v}}_r  =\\begin{vmatrix} \\vv{i}&amp; \\vv{j}&amp; \\vv{k}  \\\\[1.1ex] 4&amp;-3&amp;0 \\\\[1.1ex] -1&amp;3&amp;2 \\end{vmatrix}=-6\\vv{i} -8\\vv{j}+9\\vv{k}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"316\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-bcf2fce752d73d75254674158d4824b4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\left|\\vv{QP} \\times \\vv{\\text{v}}_r \\right| =\\sqrt{(-6)^2+(-8)^2+9^2} = \\sqrt{36+64+81} = \\sqrt{181}\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"464\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p> E, por outro lado, encontramos a magnitude do vetor da reta<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c5986f031932e6b3512dc564514c34b5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"r:\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"17\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-beb8af5ebd61faa6a707fabf3a13de60_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lvert \\vv{\\text{v}}_r \\rvert = \\sqrt{(-1)^2+3^2+2^2} = \\sqrt{1+9+4} = \\sqrt{14}\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"351\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p> Por fim, substitu\u00edmos o valor de cada termo na f\u00f3rmula e calculamos a dist\u00e2ncia entre as linhas:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dfc98500cdf36f3b5f09c525579f7f9c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(s,r)=d(P,r)=\\cfrac{\\lvert \\vv{QP} \\times \\vv{\\text{v}}_r \\rvert}{\\lvert \\vv{\\text{v}}_r \\rvert}=\\cfrac{\\sqrt{181}}{\\sqrt{14}} = \\bm{3,60}\" title=\"Rendered by QuickLaTeX.com\" height=\"46\" width=\"350\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p> Portanto, a dist\u00e2ncia entre as duas linhas \u00e9 de 3,60 unidades. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"como-determinar-la-distancia-entre-dos-rectas-que-se-cruzan-en-el-espacio\"><\/span> Como determinar a dist\u00e2ncia entre duas linhas que se cruzam no espa\u00e7o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Como vimos no in\u00edcio, o m\u00e9todo para determinar a dist\u00e2ncia entre duas retas que se cruzam \u00e9 diferente do procedimento para dist\u00e2ncias entre retas paralelas. <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/uploads\/2023\/07\/lignes-dintersection-1.webp\" alt=\"dist\u00e2ncia entre linhas cruzadas no espa\u00e7o\" class=\"wp-image-2692\" width=\"226\" height=\"221\" srcset=\"\" sizes=\"auto, \"><\/figure>\n<\/div>\n<p> Assim, existem v\u00e1rios m\u00e9todos para determinar a dist\u00e2ncia entre duas linhas que se cruzam no espa\u00e7o. Nesta p\u00e1gina explicaremos apenas um procedimento, o mais simples, pois os outros dois m\u00e9todos s\u00e3o mais longos e complicados, ali\u00e1s, praticamente n\u00e3o s\u00e3o utilizados. <\/p>\n<div style=\"background-color:#FFCC8080;padding-top: 20px; padding-bottom: 0.5px; padding-right: 30px; padding-left: 30px; border: 2px solid #FFB74D; border-radius:20px;\">\n<p style=\"text-align:left\"> Seja o vetor de dire\u00e7\u00e3o e qualquer ponto de duas linhas que se cruzam:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-569f8d554a0f3704d247862d0b8ef852_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle r: \\ \\begin{cases} \\vv{\\text{u}} \\\\[2ex] A\\end{cases} \\qquad \\qquad s: \\ \\begin{cases} \\vv{\\text{v}} \\\\[2ex] B\\end{cases}\" title=\"Rendered by QuickLaTeX.com\" height=\"65\" width=\"210\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p style=\"text-align:left\"> A <strong>f\u00f3rmula para a dist\u00e2ncia entre duas linhas que se cruzam<\/strong> \u00e9:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c613737cb66f811b123f886afd479e0a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(r,s)=\\cfrac{\\left|\\left[\\vv{\\text{u}},\\vv{\\text{v}},\\vv{AB}\\right]\\right|}{\\lvert \\vv{\\text{u}} \\times \\vv{\\text{v}} \\rvert}\" title=\"Rendered by QuickLaTeX.com\" height=\"45\" width=\"158\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p style=\"text-align:left\"> Ouro<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dbc3e38427d29b2f4444ea732f955500_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\left|\\left[\\vv{\\text{u}},\\vv{\\text{v}},\\vv{AB}\\right]\\right|\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"78\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u00e9 o valor absoluto do produto misto dos vetores<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-4b6be5a59bbf478047e4f3ace338ee48_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{\\text{u}}, \\vv{\\text{v}}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"27\" style=\"vertical-align: -4px;\"><\/p>\n<p> e o vetor definido pelos pontos<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-25b206f25506e6d6f46be832f7119ffa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"13\" style=\"vertical-align: 0px;\"><\/p>\n<p> E<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-770fd1447ccf2fc229801b486b0d8f8a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"B\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"><\/p>\n<p> . E por outro lado,<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-a151f35eca7cc81494de906050e773fa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lvert \\vv{\\text{u}} \\times \\vv{\\text{v}} \\rvert\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"47\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u00e9 a amplitude do produto vetorial entre os vetores de dire\u00e7\u00e3o das duas linhas cruzadas.<\/p>\n<\/div>\n<p> Para que voc\u00ea veja como determinar a dist\u00e2ncia entre duas linhas cruzadas, resolveremos um problema como exemplo:<\/p>\n<ul>\n<li> Qual \u00e9 a dist\u00e2ncia entre as pr\u00f3ximas duas linhas que se cruzam?<\/li>\n<\/ul>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-6c4b9507f6e33691e0b89d18dac941cd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"r: \\  \\cfrac{x-1}{2} = \\cfrac{y-2}{4} = \\cfrac{z+2}{-1}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"203\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c6dac5d90c57534aa97625685e0d60fa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"s: \\  \\cfrac{x-3}{1} = \\cfrac{y+1}{3} = \\cfrac{z-1}{-2}\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"203\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p> Primeiro, precisamos identificar o vetor diretor e um ponto em cada reta. As duas retas s\u00e3o expressas na forma de uma equa\u00e7\u00e3o cont\u00ednua, portanto:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-8b990f78d0263975304586abbd330167_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle r: \\ \\begin{cases} \\vv{\\text{u}} =(2,4,-1) \\\\[2ex] A(1,2,-2) \\end{cases} \\qquad \\qquad s: \\ \\begin{cases} \\vv{\\text{v}}=(1,3,-2) \\\\[2ex] B(3,-1,1)\\end{cases}\" title=\"Rendered by QuickLaTeX.com\" height=\"65\" width=\"389\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> E agora aplicamos a f\u00f3rmula para a dist\u00e2ncia entre duas linhas que se cruzam:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c613737cb66f811b123f886afd479e0a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(r,s)=\\cfrac{\\left|\\left[\\vv{\\text{u}},\\vv{\\text{v}},\\vv{AB}\\right]\\right|}{\\lvert \\vv{\\text{u}} \\times \\vv{\\text{v}} \\rvert}\" title=\"Rendered by QuickLaTeX.com\" height=\"45\" width=\"158\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p> Por um lado resolvemos o produto misto (ou produto escalar triplo):<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-3238f24b114cb49bf33dd66bccad1ef3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{AB} = B - A = (3,-1,1) - (1,2,-2) = (2,-3,3)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"379\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c52c12945d04e320e688caf714569113_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\left|\\left[\\vv{\\text{u}},\\vv{\\text{v}},\\vv{AB}\\right]\\right| =\\left| \\begin{vmatrix} 2&amp;4&amp;-1 \\\\[1.1ex] 1&amp;3&amp;-2 \\\\[1.1ex] 2&amp;-3&amp;3 \\end{vmatrix}\\right| = \\left| -13 \\right| =13\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"321\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> E, por outro lado, encontramos o m\u00f3dulo do produto vetorial (ou produto vetorial):<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-71afa7d4b49e542300c12b5263858665_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\vv{\\text{u}} \\times \\vv{\\text{v}} =\\begin{vmatrix} \\vv{i}&amp; \\vv{j}&amp; \\vv{k} \\\\[1.1ex] 2&amp;4&amp;-1 \\\\[1.1ex] 1&amp;3&amp;-2 \\end{vmatrix}=-5\\vv{i} +3\\vv{j}+2\\vv{k}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"278\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-3c940dca4c85f7176555de5861b8f391_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\left| \\vv{\\text{u}} \\times \\vv{\\text{v}} \\right| =\\sqrt{5^2+3^2+2^2} = \\sqrt{25+9+4} = \\sqrt{38}\" title=\"Rendered by QuickLaTeX.com\" height=\"21\" width=\"354\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p> Por fim, substitu\u00edmos o valor de cada termo na f\u00f3rmula pela dist\u00e2ncia entre duas linhas cruzadas:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b0aac39997c35738e8e84a29ff7c97c6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d(r,s)=\\cfrac{\\left|\\left[\\vv{\\text{u}},\\vv{\\text{v}},\\vv{AB}\\right]\\right|}{\\lvert \\vv{\\text{u}} \\times \\vv{\\text{v}} \\rvert} = \\cfrac{13}{\\sqrt{38}}= \\bm{2,11}\" title=\"Rendered by QuickLaTeX.com\" height=\"45\" width=\"273\" style=\"vertical-align: -17px;\"><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nesta p\u00e1gina voc\u00ea descobrir\u00e1 como \u00e9 calculada a dist\u00e2ncia entre duas retas no espa\u00e7o (em R3), qualquer que seja o seu tipo (retas paralelas, secantes, coincidentes, secantes, perpendiculares, etc.). Al\u00e9m disso, voc\u00ea poder\u00e1 ver exemplos e exerc\u00edcios resolvidos passo a passo. Como calcular a dist\u00e2ncia entre duas linhas A dist\u00e2ncia entre duas linhas \u00e9 a &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/mathority.org\/pt\/distancia-entre-duas-linhas-no-espaco-em-r3\/\"> <span class=\"screen-reader-text\">Dist\u00e2ncia entre duas linhas no espa\u00e7o (em r3)<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[20],"tags":[],"class_list":["post-255","post","type-post","status-publish","format-standard","hentry","category-pontos-retas-e-planos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dist\u00e2ncia entre duas linhas no espa\u00e7o (em R3) - Mathority<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mathority.org\/pt\/distancia-entre-duas-linhas-no-espaco-em-r3\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dist\u00e2ncia entre duas linhas no espa\u00e7o (em R3) - Mathority\" \/>\n<meta property=\"og:description\" content=\"Nesta p\u00e1gina voc\u00ea descobrir\u00e1 como \u00e9 calculada a dist\u00e2ncia entre duas retas no espa\u00e7o (em R3), qualquer que seja o seu tipo (retas paralelas, secantes, coincidentes, secantes, perpendiculares, etc.). 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