黄金三角形有两种,一种是顶角为36°的等腰三角形,另一种是顶角为108°的等腰三角形.例如,一个正五边形可以看成是由正五角星和五个顶角为108°的黄金三角形组成,如图所示,在黄金三角形
中,
.根据这些信息,若在正五边形
内任取一点,则该点取自正五边形
内的概率是___________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750aca100d3b8e428f2c024718094095.png)
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![](https://img.xkw.com/dksih/QBM/2020/7/22/2511317433376768/2512247282466816/STEM/491bda2d-cb91-4136-8aef-2faea4ef703e.png)
2020·河南·模拟预测 查看更多[8]
2019-2020年度河南省高三考前适应性考试数学 (理科) 试题河南省2020届高三考前6月份适应性考试理数试题安徽省皖西南名校2019-2020学年高二下学期期末联考数学(理)试题(已下线)黑龙江省哈尔滨市第三中学2020-2021学年高三1月线上学习阶段性考试数学(文)试题(已下线)专题12 几何概型(客观题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)专题12 几何概型(客观题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题11 几何概型(客观题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)考点52 概率-备战2021年高考数学经典小题考前必刷(新高考地区专用)
更新时间:2020-07-23 20:03:05
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解题方法
【推荐1】在
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的对边分别为
.若
,
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,
是
边上的高线,点
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