如图,角ABC的周长为20cm,P为角ABC内角平分线的交点,P到AB的距离为3cm,则角ABC的面积为如上.请说明为什么。分析
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![如图,角ABC的周长为20cm,P为角ABC内角平分线的交点,P到AB的距离为3cm,则角ABC的面积为如上.请说明为什么。分析](/uploads/image/z/6134454-54-4.jpg?t=%E5%A6%82%E5%9B%BE%2C%E8%A7%92ABC%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BA20cm%2CP%E4%B8%BA%E8%A7%92ABC%E5%86%85%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E7%9A%84%E4%BA%A4%E7%82%B9%2CP%E5%88%B0AB%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA3cm%2C%E5%88%99%E8%A7%92ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BA%E5%A6%82%E4%B8%8A.%E8%AF%B7%E8%AF%B4%E6%98%8E%E4%B8%BA%E4%BB%80%E4%B9%88%E3%80%82%E5%88%86%E6%9E%90)
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