题目内容
请在图中作出线段
使其平分
且长度等于
．(要求：用尺规作图，并写出已知、求作，保留作图痕迹，不写作法和结论)
解：两边同乘以
得
····························4分
经检验：是原方程的根。
∴原方程的解为： ····························6分
19．已知：线段m，∠BAC·························1分
求作：线段AD,使得∠BAD=∠CAD. AD="m" ····2分
画图·········································4分解析:
略
得 ····························4分经检验：
是原方程的根。∴原方程的解为：
····························6分19．已知：线段m，∠BAC·························1分
求作：线段AD,使得∠BAD=∠CAD. AD="m" ····2分
画图·········································4分解析:
略
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使其平分
且长度等于
．
