已知线段a.b,画一条线段,使它等于a+2b(写出已知.求作.作法)
I_________Ia
I____I b
(这是线段a.b)
人气:163 ℃ 时间:2019-09-17 08:26:09
解答
已知:线段a.b,
求作:线段AB,使它等于a+2b.
作法:
①作射线AM
②在射线AM上取点C,使AC=a,
③在射线CM上取点D,使CD=b,
④在射线DM上取点B,使DB=b,
线段AB就是所作的线段.
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