已知线段CD,延长CD到B,使DB=CD,延长DC到A,使CA=CB,若AB=12厘米,求CD的长
人气:460 ℃ 时间:2020-04-03 09:30:48
解答
设CD=x,
由于DB=CD,则CB=CD+DB=2x.
AB=CA+CB=2*CB=2*2x=4x
即4x=12
x=3厘米.
CD=3厘米
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