{"id":2198,"date":"2026-10-15T02:10:19","date_gmt":"2026-10-15T01:10:19","guid":{"rendered":"https:\/\/wpcalc.com\/pt\/matematica\/calculadora-area-setor-circular\/"},"modified":"2026-10-15T02:10:19","modified_gmt":"2026-10-15T01:10:19","slug":"calculadora-area-setor-circular","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/pt\/matematica\/calculadora-area-setor-circular\/","title":{"rendered":"Calculadora de \u00e1rea do setor circular"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Calcule a \u00e1rea de um setor circular a partir do raio e do \u00e2ngulo<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"2198\" data-favorite-title=\"\u00c1rea do setor circular\" data-favorite-url=\"https:\/\/wpcalc.com\/pt\/matematica\/calculadora-area-setor-circular\/\" data-favorite-excerpt=\"Calcule a \u00e1rea de um setor circular a partir do raio e do \u00e2ngulo central. Informe o raio, escolha a unidade (graus, radianos ou grados) e obtenha a \u00e1rea do setor, o comprimento do arco, o per\u00edmetro e a fra\u00e7\u00e3o do c\u00edrculo completo.\" aria-label=\"Adicionar aos favoritos\" data-favorite-icon=\"icon icon-geometry\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/pt\/matematica\/calculadora-area-setor-circular\/\" method=\"POST\" class=\"calculator\" id=\"calculator-2198\" data-post=\"2198\"><fieldset class=\"fieldset-input is-2\"><legend class=\"sr-only\">Campos de entrada<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Raio<\/label><div class=\"term\">r<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"raio\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"5\" min=\"0\" value=\"5\"\/><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"m\" selected>m<\/option><option value=\"cm\">cm<\/option><option value=\"mm\">mm<\/option><option value=\"ft\">ft<\/option><option value=\"in\">in<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-1\">Dist\u00e2ncia do centro do c\u00edrculo at\u00e9 o arco.<\/small><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-3\">\u00c2ngulo central<\/label><div class=\"term\">\u03b8<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"ngulo_central\" id=\"field-3\" aria-describedby=\"calc-info-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"60\" min=\"0\" value=\"60\"\/><div class=\"grid grid-cols-1\"><select id=\"field-4\" name=\"unidade\" aria-label=\"Unidade\"><option value=\"deg\" selected>graus<\/option><option value=\"rad\">rad<\/option><option value=\"grad\">grad<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><small id=\"calc-info-3\">\u00c2ngulo entre os dois raios do setor. S\u00e3o permitidos valores acima de 360\u00b0 (mais de uma volta completa).<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Recalcular\" id=\"calculate-button\" data-post=\"2198\">Calcular<\/button><button type=\"reset\">Redefinir<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calcular automaticamente<\/label><small>Se ativado, o resultado \u00e9 atualizado automaticamente quando voc\u00ea altera qualquer valor.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Seu setor<\/h3><div class=\"result-box\"><div class=\"field-result is-column\" id=\"output-1\"><span class=\"field-title\"><span>\u00c1rea do setor<\/span><span class=\"result-term\">A<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Comprimento do arco<\/span><span class=\"result-term\">L<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Per\u00edmetro<\/span><span class=\"result-term\">P<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-4\"><span class=\"field-title\"><span>Fra\u00e7\u00e3o do c\u00edrculo<\/span><\/span><span class=\"field-value\" id=\"result-4\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-5\"><span class=\"field-title\"><span>Etapas do c\u00e1lculo<\/span><\/span><span class=\"field-value\" id=\"result-5\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copiar resultado\" aria-label=\"Copiar resultado\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copiar link para este c\u00e1lculo<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Deixar um coment\u00e1rio<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"2198\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">O que voc\u00ea achou deste resultado?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Curti <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">\u00datil <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confuso <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Decepcionado <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Impreciso <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>\u00c1rea do setor<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">F\u00f3rmula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\\[ A = \\frac{\\theta}{2}\\, r^2 \\qquad L = \\theta\\, r \\qquad P = 2r + L \\]<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Onde:<\/strong><\/p>\n<ul>\n<li>\\(A\\) \u2014 \u00e1rea do setor (unidades quadradas, por exemplo m\u00b2)<\/li>\n<li>\\(L\\) \u2014 comprimento do arco do setor (na mesma unidade do raio)<\/li>\n<li>\\(P\\) \u2014 per\u00edmetro do setor (dois raios mais o arco)<\/li>\n<li>\\(r\\) \u2014 raio do c\u00edrculo<\/li>\n<li>\\(\\theta\\) \u2014 \u00e2ngulo central em <strong>radianos<\/strong><\/li>\n<\/ul>\n<p>A \u00e1rea do setor \u00e9 simplesmente a fra\u00e7\u00e3o da \u00e1rea total do c\u00edrculo \\(\\pi r^2\\) que o \u00e2ngulo \\(\\theta\\) abrange: como o c\u00edrculo completo corresponde a \\(2\\pi\\) radianos, o setor ocupa \\(\\theta \/ 2\\pi\\) dela.<\/p>\n<p>Se o seu \u00e2ngulo estiver em graus, converta-o primeiro: \\(\\theta_{\\text{rad}} = \\theta_{\\text{graus}} \\cdot \\pi \/ 180\\). A calculadora faz essa convers\u00e3o automaticamente.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-2\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>\u00c1rea do setor \u2013 Exemplo de c\u00e1lculo<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Exemplo:<\/strong> um setor circular tem raio de 5 m e \u00e2ngulo central de 60\u00b0. Determine sua \u00e1rea, o comprimento do arco e o per\u00edmetro.<\/p>\n<p>\\[ \\theta = 60\u00b0 \\cdot \\frac{\\pi}{180} = \\frac{\\pi}{3} \\approx 1.047 \\text{ rad} \\]<\/p>\n<p>\\[ A = \\frac{\\theta}{2} r^2 = \\frac{1.047}{2} \\cdot 5^2 \\approx 13.09 \\text{ m}^2 \\]<\/p>\n<p>\\[ L = \\theta r = 1.047 \\cdot 5 \\approx 5.236 \\text{ m}, \\qquad P = 2 \\cdot 5 + 5.236 \\approx 15.236 \\text{ m} \\]<\/p>\n<p><strong>Resultado:<\/strong> a \u00e1rea do setor \u00e9 de aproximadamente 13,09 m\u00b2, o comprimento do arco \u00e9 5,236 m e o per\u00edmetro \u00e9 15,236 m. O setor abrange \\(60\/360 = 1\/6 \\approx 0.167\\) do c\u00edrculo completo.<\/p>\n<p>\n\r\n<\/section>\n<h2>Como usar a calculadora<\/h2>\n<ol>\n<li>Informe o <strong>Raio<\/strong> do c\u00edrculo e escolha sua unidade (m, cm, mm, ft ou in). A \u00e1rea ser\u00e1 exibida na unidade quadrada correspondente.<\/li>\n<li>Informe o <strong>\u00c2ngulo central<\/strong> entre os dois raios e escolha sua unidade: graus, radianos ou grados.<\/li>\n<li>Leia os resultados: <strong>\u00c1rea do setor<\/strong> (com a \u00e1rea do c\u00edrculo completo para compara\u00e7\u00e3o), <strong>Comprimento do arco<\/strong>, <strong>Per\u00edmetro<\/strong>, <strong>Fra\u00e7\u00e3o do c\u00edrculo<\/strong> e o c\u00e1lculo passo a passo.<\/li>\n<\/ol>\n<p>O raio e o \u00e2ngulo devem ser ambos maiores que zero. \u00c2ngulos acima de 360\u00b0 s\u00e3o aceitos \u2014 nesse caso, o setor d\u00e1 mais de uma volta em torno do centro e a \u00e1rea cresce proporcionalmente.<\/p>\n<h2>O que \u00e9 um setor circular?<\/h2>\n<p>Um setor circular \u00e9 a regi\u00e3o de um c\u00edrculo delimitada por dois raios e o arco entre eles \u2014 o formato de uma fatia de pizza, de uma fatia de gr\u00e1fico de pizza ou de um leque. Todo setor \u00e9 definido por exatamente duas grandezas: o raio \\(r\\) do c\u00edrculo a que pertence e o \u00e2ngulo central \\(\\theta\\), que determina a abertura da \"fatia\" no centro.<\/p>\n<p>A ideia central por tr\u00e1s da f\u00f3rmula \u00e9 a proporcionalidade. Um c\u00edrculo completo, com \u00e2ngulo de \\(2\\pi\\) radianos, tem \u00e1rea \\(\\pi r^2\\); um setor com \u00e2ngulo \\(\\theta\\) abrange exatamente \\(\\theta\/2\\pi\\) dessa \u00e1rea. Cancelando \\(\\pi\\), chega-se ao resultado compacto \\(A = \\frac{\\theta}{2} r^2\\). Para um raio fixo, a \u00e1rea cresce em <a href=\"https:\/\/wpcalc.com\/pt\/matematica\/variacao-direta\/\">varia\u00e7\u00e3o direta<\/a> com o \u00e2ngulo: dobrando o \u00e2ngulo, dobra a \u00e1rea. J\u00e1 dobrar o raio quadruplica a \u00e1rea, porque \\(r\\) est\u00e1 elevado ao quadrado.<\/p>\n<p>Interpretar os resultados \u00e9 simples: o <strong>comprimento do arco<\/strong> indica o tamanho da borda curva do setor, o que \u00e9 \u00fatil para estimar materiais (acabamentos, cercas, tubos dobrados). O <strong>per\u00edmetro<\/strong> soma os dois raios retos ao arco \u2014 o contorno completo da fatia. A <strong>fra\u00e7\u00e3o do c\u00edrculo<\/strong> coloca o tamanho em perspectiva: um setor de 90\u00b0 \u00e9 um quarto do c\u00edrculo, um de 60\u00b0 \u00e9 um sexto, e assim por diante \u2014 exatamente como funcionam as propor\u00e7\u00f5es de um gr\u00e1fico de pizza.<\/p>\n<h2>Unidades, premissas e dicas<\/h2>\n<ul>\n<li><strong>A unidade do \u00e2ngulo faz diferen\u00e7a.<\/strong> A f\u00f3rmula exige radianos. Se voc\u00ea estiver calculando \u00e0 m\u00e3o com graus, converta primeiro: multiplique por \\(\\pi\/180\\). A calculadora converte graus, radianos e grados automaticamente. Um grado equivale a 0,9\u00b0, e uma volta completa tem 400 grados.<\/li>\n<li><strong>A unidade de comprimento vai ao quadrado na \u00e1rea.<\/strong> Um raio em metros resulta em \u00e1rea em m\u00b2; um raio em cent\u00edmetros, em cm\u00b2. Misturar unidades (por exemplo, raio em metros esperando cm\u00b2) \u00e9 uma fonte comum de erros.<\/li>\n<li><strong>O setor \u00e9 uma figura plana.<\/strong> O c\u00e1lculo pressup\u00f5e um setor circular plano; ele n\u00e3o se aplica a setores esf\u00e9ricos ou c\u00f4nicos (como a superf\u00edcie lateral curva de um cone).<\/li>\n<li><strong>\u00c2ngulos acima de 360\u00b0<\/strong> geram setores sobrepostos que d\u00e3o mais de uma volta completa \u2014 a \u00e1rea fica, ent\u00e3o, maior que a do c\u00edrculo inteiro. Use-os apenas se isso for realmente o que voc\u00ea precisa.<\/li>\n<li><strong>Casos particulares:<\/strong> com \\(\\theta = 2\\pi\\), o setor se torna o c\u00edrculo completo, com \u00e1rea \\(\\pi r^2\\); com \\(\\theta = \\pi\\), \u00e9 um semic\u00edrculo, com \u00e1rea \\(\\pi r^2\/2\\) e per\u00edmetro \\(P = 2r + \\pi r\\).<\/li>\n<\/ul>\n<h2>Tabela de consulta r\u00e1pida<\/h2>\n<p>Fra\u00e7\u00e3o do c\u00edrculo para \u00e2ngulos comuns:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u00c2ngulo central<\/th>\n<th>Em radianos<\/th>\n<th>Fra\u00e7\u00e3o do c\u00edrculo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>30\u00b0<\/td>\n<td>\\(\\pi\/6 \\approx 0.524\\)<\/td>\n<td>1\/12<\/td>\n<\/tr>\n<tr>\n<td>45\u00b0<\/td>\n<td>\\(\\pi\/4 \\approx 0.785\\)<\/td>\n<td>1\/8<\/td>\n<\/tr>\n<tr>\n<td>60\u00b0<\/td>\n<td>\\(\\pi\/3 \\approx 1.047\\)<\/td>\n<td>1\/6<\/td>\n<\/tr>\n<tr>\n<td>90\u00b0<\/td>\n<td>\\(\\pi\/2 \\approx 1.571\\)<\/td>\n<td>1\/4<\/td>\n<\/tr>\n<tr>\n<td>180\u00b0<\/td>\n<td>\\(\\pi \\approx 3.142\\)<\/td>\n<td>1\/2<\/td>\n<\/tr>\n<tr>\n<td>270\u00b0<\/td>\n<td>\\(3\\pi\/2 \\approx 4.712\\)<\/td>\n<td>3\/4<\/td>\n<\/tr>\n<tr>\n<td>360\u00b0<\/td>\n<td>\\(2\\pi \\approx 6.283\\)<\/td>\n<td>1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Para obter a \u00e1rea a partir desta tabela, basta <a href=\"https:\/\/wpcalc.com\/pt\/matematica\/calculadora-de-multiplicacao\/\">multiplicar<\/a> a fra\u00e7\u00e3o pela \u00e1rea do c\u00edrculo completo \\(\\pi r^2\\) \u2014 ou deixar que a calculadora fa\u00e7a isso por voc\u00ea.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calcule a \u00e1rea de um setor circular a partir do raio e do \u00e2ngulo central. Informe o raio, escolha a unidade (graus, radianos ou grados) e obtenha a \u00e1rea do setor, o comprimento do arco, o per\u00edmetro e a fra\u00e7\u00e3o do c\u00edrculo completo.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[42],"class_list":["post-2198","post","type-post","status-publish","format-standard","hentry","category-matematica","tag-geometria"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/comments?post=2198"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2198\/revisions"}],"predecessor-version":[{"id":2249,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/posts\/2198\/revisions\/2249"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/media?parent=2198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/categories?post=2198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/pt\/wp-json\/wp\/v2\/tags?post=2198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}