1 . 选修4-1:几何证明选讲
如图,点
是圆
直径
的延长线上一点,
是圆
的切线,
为切点,
的平分线
与
相交于点
,与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
的度数;
(2)若
,证明:
.
如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbb28736e2f6d739a732a2a0a20cabc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12826d3f5dd6c54aaab317faad297c2a.png)
您最近一年使用:0次
2016-12-04更新
|
344次组卷
|
2卷引用:2017届三省高三上学期百校大联考数学(理)试卷
2 . 选修4-1:几何证明选讲
如图,
为
上的三个点,
是
的平分线,交
于点
,过
作
的切线交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/7ff0a669998d48ffb1279460237fc02b.png)
(1)证明:
平分
;
(2)证明:
.
如图,
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/4db0d6608bd24981b524fe111be19733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/4d6591ddab784824a0f1ce67ab80f6be.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/34da41eca4b446b2a81a3db6a38005fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/6d24a9bd7ca74859a6f8cbb725889e0e.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/4e28ec260356440f96060543568f2cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/4d6591ddab784824a0f1ce67ab80f6be.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/44b9f7fad84e4677a7fbcbf13916f204.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/7ff0a669998d48ffb1279460237fc02b.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/67b47567a9cd468fbeec380aa4479c34.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/fbf4d7d359624b479b05f0b889740239.png)
(2)证明:
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035953590272/1572035959455744/STEM/6c284e2ca547426e8fb027c57a2e1d03.png)
您最近一年使用:0次
2016-12-03更新
|
827次组卷
|
2卷引用:2015年东北三省四市教研联合体高考模拟试卷(一)理科数学试卷
3 . 选修4-1:几何证明选讲
如图,在
中,
,以
为直径的圆
交
于点
,点
是
边的中点,连接
交圆
于点
.
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/5d33ff30059d4cac9918bc5566fc1a03.png)
(Ⅰ)求证:
是圆
的切线;
(Ⅱ)求证:
.
如图,在
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/b795d5170ea74e0e8ae5ac32c6998610.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/e166a52448f24d6aaf34c5b1f1d2bd89.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/cc4d42c8f44c4d89a5f831db226ff5fe.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/a06e96af970c4255ab0e1a25a0182cc4.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/f7c4c4ac5cb74dbea267c0635e8ee041.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/b8bea577d29844e395c7fe20cefe6d96.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/4f683afe39f94899bbe589b1116ed51d.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/d6f266ed4ce54a349855dcf395fa530b.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/1a8affa475dd441ab6bbcd06cd8aad47.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/a06e96af970c4255ab0e1a25a0182cc4.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/40cb78bd42834166ae60afb21a8c15be.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/5d33ff30059d4cac9918bc5566fc1a03.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/ab7882026c6445f0bf667ad98269ccfc.png)
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/a06e96af970c4255ab0e1a25a0182cc4.png)
(Ⅱ)求证:
![](https://img.xkw.com/dksih/QBM/2015/3/26/1572035386146816/1572035392274432/STEM/22bf2fb0368c4a5cb99a0d7c5356fb8a.png)
您最近一年使用:0次
2014·全国·一模
4 . 如图,
是
的一条切线,切点为
,
都是
的割线,
.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572590367744000/1572590373912576/STEM/5297280ab3844b278251f6859657c2be.png)
(1)证明:
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4460e74c0d5524d6fe39a2c10e929a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572590367744000/1572590373912576/STEM/5297280ab3844b278251f6859657c2be.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82906cee2d1308bf5826626609e75f3.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625b4c2492d39e4f369cb5e724b00af1.png)
您最近一年使用:0次
12-13高三下·河北石家庄·阶段练习
5 . 选修4-1几何证明选讲
如图,AB是
O的直径,BE为圆0的切线,点c为
o 上不同于A、B的一点,AD为
的平分线,且分别与BC 交于H,与
O交于D,与BE交于E,连结BD、CD.
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/b348fe291c244484bf89e15a5a8a6a2c.png)
(I )求证:BD平分![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/f54719e7f9d54dee90b65968e935b270.png)
(II)求证:AH•BH=AE•HC
如图,AB是
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/8b43c3c3b2144703b527e83c122a5c2a.png)
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/8b43c3c3b2144703b527e83c122a5c2a.png)
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/2d4d4061425c45c6aaf748b93fc86366.png)
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/8b43c3c3b2144703b527e83c122a5c2a.png)
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/b348fe291c244484bf89e15a5a8a6a2c.png)
(I )求证:BD平分
![](https://img.xkw.com/dksih/QBM/2013/3/15/1571143959781376/1571143965417472/STEM/f54719e7f9d54dee90b65968e935b270.png)
(II)求证:AH•BH=AE•HC
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6 . 已知圆M:x2+y2-2x-4y+1=0,则圆心M到直线
(t为参数)的距离为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44061d394baa6e551c41178e4430e610.png)
您最近一年使用:0次