已知Rt△ABC中,CD是斜边AB上的高,BE是角平分线并且与CD交于F,CH⊥EF,垂足为H,延长CH与AB交于G.
![](https://img.xkw.com/dksih/QBM/2019/4/11/2180013395902464/2181526744260609/STEM/f6e41111c6ee45219076d0203b7050e1.png?resizew=265)
(1)求证:
;
(2)若AC=2BC,求证EA=5FD.
![](https://img.xkw.com/dksih/QBM/2019/4/11/2180013395902464/2181526744260609/STEM/f6e41111c6ee45219076d0203b7050e1.png?resizew=265)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de0f9cba1248d3dd476fd1c6f0afe6d.png)
(2)若AC=2BC,求证EA=5FD.
更新时间:2019-04-13 13:50:26
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
适中
(0.64)
【推荐1】如图所示,已知圆O外有一点P,作圆O的切线PM,M为切点,过PM的中点N,作割线NAB,交圆于A、B两点,连接PA并延长,交圆O于点C,连接PB交圆O于点D,若MC=BC.
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572884813160448/1572884819247104/STEM/dc4ea4beb2c241d7b9923d3804fb0509.png)
(I)求证:△APM∽△ABP;
(II)求证:四边形PMCD是平行四边形.
![](https://img.xkw.com/dksih/QBM/2016/7/5/1572884813160448/1572884819247104/STEM/dc4ea4beb2c241d7b9923d3804fb0509.png)
(I)求证:△APM∽△ABP;
(II)求证:四边形PMCD是平行四边形.
您最近一年使用:0次
解答题-问答题
|
适中
(0.64)
【推荐2】选修4-1:几何证明选讲
在
的边
上分别取
,使得
,又点
是
的外心.
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572964985274368/1572964991705088/STEM/a89e2fa6d00448a5862d054d644f0aae.png)
(1)证明:
四点共圆;
(2)证明:
在
的平分线上.
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e661d825b7a6061e4d26fe5c53df73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0e8585806f8f92167c392e0403c01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec012a6e524839874fd5e757c5fef8e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572964985274368/1572964991705088/STEM/a89e2fa6d00448a5862d054d644f0aae.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572964985274368/1572964991705088/STEM/554a9f65c75c47cf8ea4e4e00bc921b9.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/8/1572964985274368/1572964991705088/STEM/ad7f4e0108c34af5b95e6c382c98ec00.png)
您最近一年使用:0次