(1)如图1,在Rt△ABC中,AB=3,AC=4,BC=5,若直线EF垂直平分BC,请你利用尺规画出直线EF;
(2)若点P在(1)中BC的垂直平分线EF上,请直接写出PA+PB的最小值,回答PA+PB取最小值时点P的位置并在图中标出来;
解:PA+PB的最小值为 ,PA+PB取最小值时点P的位置是 ;
(3)如图2,点M,N分别在直线AB两侧,在直线AB上找一点Q,使得∠MQB=∠NQB.要求画图,并简要叙述确定点Q位置的步骤(无需尺规作图,保留画图痕迹,无需证明)
解:确定点Q位置的简要步骤: .
(2)若点P在(1)中BC的垂直平分线EF上,请直接写出PA+PB的最小值,回答PA+PB取最小值时点P的位置并在图中标出来;
解:PA+PB的最小值为 ,PA+PB取最小值时点P的位置是 ;
(3)如图2,点M,N分别在直线AB两侧,在直线AB上找一点Q,使得∠MQB=∠NQB.要求画图,并简要叙述确定点Q位置的步骤(无需尺规作图,保留画图痕迹,无需证明)
解:确定点Q位置的简要步骤: .
![](https://img.xkw.com/dksih/QBM/2019/3/21/2165237699624960/2166093178822656/STEM/e527a85679094977b067c6fe96e18a80.png?resizew=385)
18-19八年级上·河北保定·期末 查看更多[3]
【校级联考】河北省保定市高阳县2018--2019学年八年级第一学期期末教学质量检测数学试题(已下线)专题5.17 简单的轴对称图形(最值问题)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)(已下线)专题5.19 生活中的轴对称(全章复习与巩固)(基础篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)
更新时间:2019-03-22 18:30:45
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