来自朴柱宏的问题
【如果等腰直角三角形的内切圆半径为1,那么斜边长为快】
如果等腰直角三角形的内切圆半径为1,那么斜边长为
快
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2020-05-19 16:48
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解；根据直角三角形内切圆半径与三边长的关系,有
r=（a+b-c）/2,因为a=b,则c=√2a,a=√2c/2
所以2r=a+b-c=√2c/2+√2c/2-c=（√2-1）c
所以c=2/（√2-1）=2√2+2
答：如果等腰直角三角形的内切圆半径为1,那么斜边长为：2倍的根号2+2
2020-05-19 16:52:47
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