某节数学课中,老师请同学自行证明等腰三角形一条性质:等腰三角形的两底角相等,下面三位同学的证明 过程正确的有( )个.
小明:如图1,已知AB=AC,取BC的中点D,连接AD,可证明△ABD≌△ACD,则∠B=∠C,性质得证.
小花:选取某一等腰三角形,通过折叠的方法,可以将两底角重合,故两底角相等,性质得证.
小帅:如图2,分别过点B,C作AB,AC的垂线,垂足分别为点M,N,因为AB=AC,而△ABC面积不变,所以CM=BN,可证明Rt△BNC≌Rt△CMB,则∠ABC=∠ACB,性质得证.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/7dfe4a0c-4604-474b-a7e2-82f9c3681892.png?resizew=298)
小明:如图1,已知AB=AC,取BC的中点D,连接AD,可证明△ABD≌△ACD,则∠B=∠C,性质得证.
小花:选取某一等腰三角形,通过折叠的方法,可以将两底角重合,故两底角相等,性质得证.
小帅:如图2,分别过点B,C作AB,AC的垂线,垂足分别为点M,N,因为AB=AC,而△ABC面积不变,所以CM=BN,可证明Rt△BNC≌Rt△CMB,则∠ABC=∠ACB,性质得证.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/7dfe4a0c-4604-474b-a7e2-82f9c3681892.png?resizew=298)
A.0 | B.1 | C.2 | D.3 |
21-22八年级下·四川成都·期末 查看更多[4]
四川省成都市新都区2021-2021学年八年级下学期期末数学试题(已下线)专题5.3 轴对称现象及性质(巩固篇)(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)(已下线)期末难点特训(一)选填压轴50道-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(北师大版)(已下线)期末押题预测卷(2)-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(北师大版)
更新时间:2022-08-22 21:50:20
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