{"id":2454,"date":"2020-10-15T11:26:39","date_gmt":"2020-10-15T03:26:39","guid":{"rendered":"https:\/\/www.study-together.com\/edu\/?page_id=2454"},"modified":"2020-11-02T14:45:52","modified_gmt":"2020-11-02T06:45:52","slug":"geometry-n-sides-polygon","status":"publish","type":"page","link":"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/geometry-n-sides-polygon\/","title":{"rendered":"12. \u6f14\u7e79\u63a8\u7406\u5e7e\u4f55 > \u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2454\" class=\"elementor elementor-2454\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a1ab846 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a1ab846\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-ad00a0d\" data-id=\"ad00a0d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-34bb9e9 elementor-widget elementor-widget-text-editor\" data-id=\"34bb9e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>12.7. \u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406<\/h2><p>\u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406 \u5176\u5be6\u5f97\u5169\u689d\uff0c\u5982\u4e0b\u5716\uff1a<\/p><p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-2456\" src=\"https:\/\/www.study-together.com\/edu\/wp-content\/uploads\/2020\/10\/dseGeometry_09.webp\" alt=\"\u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406\" width=\"641\" height=\"348\" \/><\/p><p>\u96d6\u7136\u591a\u908a\u5f62\u5605\u554f\u984c\u4e00\u822c\u5514\u6703\u592a\u96e3\uff0c\u4f46\u540c\u5b78\u53ef\u80fd\u88ab&#8221;\u5514\u77e5\u6709\u5e7e\u591a\u908a\u689d&#8221;\u5687\u89aa\u800c\u5f80\u5f80\u8868\u73fe\u672a\u5982\u7406\u60f3\u3002\u53e6\u4e00\u65b9\u9762\u53ef\u80fd\u56e0\u70ba\u5c11\u505a\uff0c\u6240\u4ee5\u5514\u8a18\u5f97\u6709\u516c\u5f0f\u3002\u5176\u5be6\u53ea\u8981\u660e\u767d\u4f9d\u5169\u689d\u5b9a\u7406\u4fc2\u9ede\u5f97\u569f\u5605\uff0c\u5230\u6642\u201c\u505a\u201d\u8fd4\u689d\u5f0f\u51fa\u569f\u90fd\u5514\u4fc2\u597d\u96e3\u3002<\/p><ul><li>\u89e3\u62c6 n\u908a\u5f62\u5167\u89d2\u548c\u516c\u5f0f<ul><li>\u5927\u5bb6\u5148\u55ba\u7d19\u5ea6\u5283\u4e00\u500b\u4e94\u908a\u5f62<\/li><li>\u7531\u5176\u4e2d\u4e00\u500b\u9802\u9ede\u5ea6\u5283\u76f4\u7dda\u5230\u5176\u4ed6\u9802\u9ede\u5ea6\u3002<\/li><li>\u6bcf\u5283\u4e00\u689d\u7dda\uff0c\u540c\u5b78\u5c31\u61c9\u8a72\u898b\u5230\u591a\u5497\u4e00\u500b\u4e09\u89d2\u5f62\u3002<\/li><li>\u6700\u7d42\u61c9\u5206\u5272\u5230\u56db\u500b\u4e09\u89d2\u5f62\u51fa\u569f\u3002<\/li><li>\u6bcf\u4e00\u500b\u4e09\u89d2\u5f62\u5605\u5167\u89d2\u548c\u4fc2180<sup>o<\/sup>\uff0c\u6240\u4ee5\u4e94\u908a\u5f62\u5167\u89d2\u548c\u4fc2<br \/>3 x 180<sup>o<\/sup> = 540<sup>o<\/sup><br \/>\u53ea\u8981\u4f60\u8a18\u5f97\u500b3\u4fc2\u201c5 \u2013 2\u201d\uff0c\u5373\u4fc2\u201c\u908a\u7684\u6578\u91cf \u6e1b 2\u201d\uff0c\u4f60\u5c31\u6703\u8a18\u5f97\uff1a<\/li><\/ul><\/li><\/ul><p style=\"text-align: center;\">\\( n\u908a\u5f62\u5167\u89d2\u548c = (n &#8211; 2) \\times 180^{\\circ} \\)<\/p><ul><li>\u89e3\u62c6 n\u908a\u5f62\u5916\u89d2\u548c<ul><li>\u5c0d\u65bc\u4e00\u500bn\u908a\u5f62\u569f\u8b1b\uff0c\u56e0\u70ba\u6709n\u689d\u908a\uff0c\u6240\u4ee5\u6709\u201cn\u500b\u76f4\u7dda\u4e0a\u7684\u9130\u89d2\u201d\u3002<\/li><li>\u591a\u908a\u5f62\u5916\u89d2\u548c<br \/>= (n\u500b\u76f4\u7dda\u4e0a\u7684\u9130\u89d2) \u2013 (<em>n<\/em>\u908a\u5f62\u5167\u89d2\u548c)<br \/>\\(= n \\times 180^{\\circ} \u2013 (n &#8211; 2) \\times 180^{\\circ} \\)<br \/>\\( = 180^{\\circ}n \u2013 180^{\\circ}n + 360^{\\circ} \\)<br \/>\\( = 360^{\\circ} \\)<\/li><\/ul><\/li><\/ul><h3>12.7.2.\u00a0 \u5e73\u884c\u56db\u908a\u5f62<\/h3><p>\u5e73\u884c\u56db\u908a\u5f62\u5176\u5be6\u5927\u5bb6\u7531\u7d30\u90fd\u8b58\uff0c\u53ea\u4fc2\u7121\u597d\u8a8d\u771f\u5481\u53bb\u7406\u89e3\u904e\u3002<\/p><p>\u5927\u5bb6\u8981\u8b58\u5605\u5c31\u4fc2\uff1a<\/p><ul><li>\u5e73\u884c\u56db\u908a\u5f62\u5c0d\u908a\u9577\u5ea6\u76f8\u7b49\u800c\u4e14\u5e73\u884c\u3002<\/li><li>\u5e73\u884c\u56db\u908a\u5f62\u5605\u5c0d\u89d2\u7dda\u4e92\u5207\u3002<br \/>\u6240\u8b02\u4e92\u5207\u5c31\u4fc2\u6307\u4e00\u689d\u5c0d\u89d2\u7dda\u6703\u5c07\u53e6\u4e00\u689d\u5c0d\u89d2\u7dda\u5207\u6210\u5169\u7b49\u4efd\uff08\u5373\u9577\u5ea6\u76f8\u7b49\uff09\u3002<\/li><li>\u83f1\u5f62\u5605\u5169\u689d\u5c0d\u89d2\u7dda\u662f\u5782\u76f4\u5605\u3002<br \/>\uff08\u8a3b\uff1a\u83f1\u5f62\u4fc2\u4e00\u500b\u56db\u689d\u908a\u90fd\u76f8\u7b49\u6216\u5167\u89d2\u5514\u7b49\u65bc90\u5ea6\u5605\u56db\u908a\u5f62\uff09\u3002<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-baa6b93 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"baa6b93\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-10f0939\" data-id=\"10f0939\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-abb5b7d elementor-widget elementor-widget-text-editor\" data-id=\"abb5b7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/geometry-pythagorean-theorem\/\"><i class=\"far fa-arrow-alt-circle-left\" aria-hidden=\"true\"><\/i> \u7562\u6c0f\u5b9a\u7406<\/a>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-89abfc4\" data-id=\"89abfc4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-dc5203b\" data-id=\"dc5203b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6f25296 elementor-widget elementor-widget-text-editor\" data-id=\"6f25296\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: right;\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/trigonometry-function-definition\/\">\u4e09\u89d2\u51fd\u6578\u7684\u5b9a\u7fa9 <i class=\"far fa-arrow-alt-circle-right\" aria-hidden=\"true\"><\/i><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-4bb78ce\" data-id=\"4bb78ce\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7bdca97 elementor-widget elementor-widget-sidebar\" data-id=\"7bdca97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"sidebar.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"sidebar-box widget-oceanwp-custom-menu custom-menu-widget clr\"><style type=\"text\/css\">.ocean_custom_menu-5 > ul > li > a, .custom-menu-widget .ocean_custom_menu-5 .dropdown-menu .sub-menu li a.menu-link{font-size:16px;line-height:17px;}.custom-menu-widget .ocean_custom_menu-5.oceanwp-custom-menu > ul.click-menu .open-this{font-size:16px;}<\/style><h4 class=\"widget-title\">DSE\u6578\u5b78 &#8211; \u5fc5\u4fee\u90e8\u5206\u3010\u76ee\u9304\u3011<\/h4><div class=\"oceanwp-custom-menu clr ocean_custom_menu-5 left dropdown-hover\"><ul id=\"menu-dsemaths_core\" class=\"dropdown-menu sf-menu\"><li  id=\"menu-item-1744\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-1744\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/course-analysis\/\" class=\"menu-link\">\u8ab2\u7a0b\u5206\u6790 (Core)<\/a><\/li>\n<li  id=\"menu-item-1745\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children dropdown menu-item-1745\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/\" class=\"menu-link\">\u5514\u597d\u4ee5\u70ba\u5514\u99db\u8003 &#8211; \u76ee\u9304 <span class=\"nav-arrow fa fa-angle-down\"><\/span><\/a>\n<ul class=\"sub-menu\">\n\t<li  id=\"menu-item-4067\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4067\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/solving-equation\/\" class=\"menu-link\">1. \u89e3\u65b9\u7a0b<\/a><\/li>\n\t<li  id=\"menu-item-4068\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4068\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/polynomials\/\" class=\"menu-link\">2. \u591a\u9805\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4069\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4069\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/laws-of-indices\/\" class=\"menu-link\">3. \u6307\u6578\u5b9a\u5f8b<\/a><\/li>\n\t<li  id=\"menu-item-4070\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4070\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/factorization\/\" class=\"menu-link\">4. \u56e0\u5f0f\u5206\u89e3<\/a><\/li>\n\t<li  id=\"menu-item-4071\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4071\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/formulae\/\" class=\"menu-link\">5. \u516c\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4072\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4072\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/percentage\/\" class=\"menu-link\">6. \u767e\u5206\u6cd5<\/a><\/li>\n\t<li  id=\"menu-item-4073\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4073\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/rate-and-ratio\/\" class=\"menu-link\">7. \u7387\u53ca\u6bd4<\/a><\/li>\n\t<li  id=\"menu-item-4074\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4074\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/functions\/\" class=\"menu-link\">8. \u51fd\u6578<\/a><\/li>\n\t<li  id=\"menu-item-4075\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4075\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/estimation\/\" class=\"menu-link\">9. \u4f30\u7b97<\/a><\/li>\n\t<li  id=\"menu-item-4076\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4076\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/inequalities\/\" class=\"menu-link\">10. \u4e0d\u7b49\u5f0f<\/a><\/li>\n\t<li  id=\"menu-item-4077\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4077\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/coordinates\/\" class=\"menu-link\">11. \u5750\u6a19<\/a><\/li>\n\t<li  id=\"menu-item-4079\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4079\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/geometry\/\" class=\"menu-link\">12. \u6f14\u7e79\u63a8\u7406\u5e7e\u4f55<\/a><\/li>\n\t<li  id=\"menu-item-4080\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4080\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/trigonometry\/\" class=\"menu-link\">13. \u4e09\u89d2\u6bd4<\/a><\/li>\n\t<li  id=\"menu-item-4081\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4081\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/shapes\/\" class=\"menu-link\">14. \u5e73\u9762\u53ca\u7acb\u9ad4\u5716\u5f62<\/a><\/li>\n\t<li  id=\"menu-item-4082\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4082\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/15-probability\/\" class=\"menu-link\">15. \u6982\u7387<\/a><\/li>\n\t<li  id=\"menu-item-4083\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-4083\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/junior_summary\/16-statistics\/\" class=\"menu-link\">16. \u7d71\u8a08<\/a><\/li>\n<\/ul>\n<\/li>\n<li  id=\"menu-item-3231\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3231\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental_algebra\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u6578\u8207\u4ee3\u6578<\/a><\/li>\n<li  id=\"menu-item-3241\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3241\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental-shape_n_space\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u5ea6\u91cf\u3001\u5716\u5f62\u8207\u7a7a\u9593<\/a><\/li>\n<li  id=\"menu-item-3246\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3246\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/fundamental_data_handling\/\" class=\"menu-link\">\u57fa\u790e &#8211; \u6578\u64da\u8655\u7406<\/a><\/li>\n<li  id=\"menu-item-3290\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3290\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental_algebra\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u6578\u8207\u4ee3\u6578<\/a><\/li>\n<li  id=\"menu-item-3288\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3288\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental-shape_n_space\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u5ea6\u91cf\u3001\u5716\u5f62\u8207\u7a7a\u9593<\/a><\/li>\n<li  id=\"menu-item-3289\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-3289\"><a href=\"https:\/\/www.study-together.com\/edu\/dse-maths-core\/non_fundamental_data_handling\/\" class=\"menu-link\">\u975e\u57fa\u790e &#8211; \u6578\u64da\u8655\u7406<\/a><\/li>\n<\/ul><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>12.7. \u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406 \u8207\u591a\u908a\u5f62\u6709\u95dc\u7684\u5b9a\u7406 \u5176\u5be6\u5f97\u5169\u689d\uff0c\u5982\u4e0b\u5716\uff1a \u96d6\u7136\u591a\u908a\u5f62\u5605\u554f\u984c\u4e00\u822c\u5514\u6703\u592a\u96e3\uff0c\u4f46\u540c\u5b78 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