设BC=3x ;CA=4x ,有勾股定理可得:AB=5x;
3x+4x+5x=60 得:x = 5
所以斜边AB长:25cm
若△ABC的周长是60cm,∠C=90°,BC比CA=3比4,它的斜边长为
若△ABC的周长是60cm,∠C=90°,BC比CA=3比4,它的斜边长为
数学人气:429 ℃时间:2019-09-24 05:05:17
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