数学一道~

miffyhui · 发表于 2012-8-12 23:19:47

Every internal angle in a polygon is less than 180.How much is the average internal angle for a polygon:
1.there are two right internal angles
2.there are five vertices
答案：B
条件一什么意思？

jeffery2541 · 发表于 2012-8-12 23:36:39

多边形有两个直角哦~

miffyhui · 发表于 2012-8-12 23:55:47

懂了，刚刚把它想成四边形了，难怪想不明白，恩~
伤心的数学~脑子浆糊了

数学一道~

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