为了探索三角形的内切圆半径r与�长l面积s之间的关系在数学实验活动中选取等边三角形和直角三角形进行研究.如图⊙o是 abc的内切圆 Template




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tomski为了探索三角形的内切圆半径r与�长l面积s之间的关系在数学实验活动中选取等边三角形和直角三角形进行研究.如图⊙o是 abc的内切圆 coloring