Mathematics
Senior High
どうしてこの式が成り立つのか教えてください
S=Vs(s-aXsーbXs-c)
三角形の内接円と面積
AABCの面積を S, 内接円の半径をrとすると
(2s=a+b+c)
S=;na+b+c)
◆多角形の面積
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