1/2*a*r + 1/2*b*r + 1/2*c*r = S
r= 2S/(a+b+c)
若△ABC的面积为S,且三边长分别为a,b,c,则三角形的内切圆的半径是多少?
若△ABC的面积为S,且三边长分别为a,b,c,则三角形的内切圆的半径是多少?
填一下空就OK啦.
谢谢.
填一下空就OK啦.
谢谢.
数学人气：943 ℃时间：2019-09-24 18:25:02
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