a+b+c=24
a+b=2b即a=b
代入到2a-b=2c里,即a=b=2c
2c+2c+c=24
c=4.8
a=b=9.6
三角形ABC的周长为24厘米,三边为a.b.c,且a+b=2b.2a-b=2c,求a.b.c
三角形ABC的周长为24厘米,三边为a.b.c,且a+b=2b.2a-b=2c,求a.b.c
数学人气：884 ℃时间：2019-09-27 15:09:18
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