不妨设b=3k,c=4k,则a=2c-b=5k
所以3k+4k+5k=24
12k=24
k=2
a=5k=10
已知三角形ABC的周长为24cm,三条边长a,b,c满足b:c=3:4,且a=2c-b,则边a的长度是
已知三角形ABC的周长为24cm,三条边长a,b,c满足b:c=3:4,且a=2c-b,则边a的长度是
数学人气:950 ℃时间:2019-10-17 08:00:30
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