1 . 如图5,四边形
是圆内接四边形,
、
的延长线交于点
,且
,
.
![](https://img.xkw.com/dksih/QBM/2016/12/7/1579043873144832/1579043873923072/STEM/012cddee36aa4ef0aba50ef8c7f48948.png)
(1) 求证:
;
(2) 当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35eb9b8f539f3b38b39331b5d31602fd.png)
![](https://img.xkw.com/dksih/QBM/2016/12/7/1579043873144832/1579043873923072/STEM/012cddee36aa4ef0aba50ef8c7f48948.png)
(1) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e71b793101fa8bae9989e86474b306a.png)
(2) 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2 . 选修4-1:几何证明选讲
如图,割线
交圆
于
、
两点,
交圆
于
,
在
上,且满足
.
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573166646697984/1573166653333504/STEM/79a3f68449234b168621f938794884b1.png)
(1)求证:
;
(2)若
,求
的长.
如图,割线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931fa192c11e576022354aa86ee366bd.png)
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573166646697984/1573166653333504/STEM/79a3f68449234b168621f938794884b1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1175ffd874187d06cb94c61f894b61d7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e43ad0c6e1ff1454686d89b3769af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
3 . 选修4—1:几何证明选讲
如图,圆周角∠BAC的平分线与圆交于点D,过点D的切线与弦AC的延长线交于点 E,AD交BC于点F.
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425883136/STEM/f6eafe135fff4714b05b98b872aa84c7.png)
(1)求证:BC∥DE;
(2)若D、E、C、F四点共圆,且
,求∠BAC.
如图,圆周角∠BAC的平分线与圆交于点D,过点D的切线与弦AC的延长线交于点 E,AD交BC于点F.
![](https://img.xkw.com/dksih/QBM/2016/10/8/1573057419362304/1573057425883136/STEM/f6eafe135fff4714b05b98b872aa84c7.png)
(1)求证:BC∥DE;
(2)若D、E、C、F四点共圆,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05355880ffa1ab4c0fb2b4c62f78e68.png)
您最近一年使用:0次
4 . A.(几何证明选讲)
如图,
为圆
的直径,
在圆
上,
于
,点
为线段
上任意一点,延长
交圆
于
,
.
(1)求证:
;
(2)若
,求
的值.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc9c9a1c828f5b3c718e2a98a749192.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b63745558b8ca67cd9a10cc85b00696.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea37f262f50b2c43b5c5fba506f3f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9935fd41734aa307e947e119880e21.png)
![](https://img.xkw.com/dksih/QBM/2017/11/26/1825705412747264/1826888858271744/STEM/b3afa65ab2774f53a783b1296f48b881.png?resizew=143)
您最近一年使用:0次
2016-12-04更新
|
189次组卷
|
3卷引用:2016届广东省深圳市高三第二次调研考试数学(理)试卷
5 . 【选修4-1:几何证明选讲】
如图,
是
的直径,弦
与
垂直,并与
相交于点
,点
为弦
上异于点
的任意一点,连接
、
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975647375360/1572975653814272/STEM/cab9236c63b24c31add9c82b90bb72f8.png)
(Ⅰ)求证:
四点共圆;
(Ⅱ)求证:
.
如图,
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975647375360/1572975653814272/STEM/cab9236c63b24c31add9c82b90bb72f8.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f804f3c39d7719eb05cc8bb83a3813.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2c519cfba4bff6d059265190499986.png)
您最近一年使用:0次
6 . 【选修4-1:几何证明选讲】
如图,
是
的直径,弦
与
垂直,并与
相交于点
,点
为弦
上异于点
的任意一点,连接
、
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/ce1e4a54bce247a29a64c5dcfcd4ef76.png)
(Ⅰ)求证:
四点共圆;
(Ⅱ)求证:
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/0ef3fa624ed9409ebe65317b73e82d71.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/0ef3fa624ed9409ebe65317b73e82d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572975353864192/1572975359819776/STEM/ce1e4a54bce247a29a64c5dcfcd4ef76.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f804f3c39d7719eb05cc8bb83a3813.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2c519cfba4bff6d059265190499986.png)
您最近一年使用:0次
7 . 选修4-1:几何证明选讲
如图,直线
经过
上的点
,并且
,
,
交直线
于
、
,连接
、
.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572961266122752/1572961272832000/STEM/d0cb6e413c474c1688e4ce397affa845.png)
(Ⅰ)求证:直线
是
的切线;
(Ⅱ)若
,
的半径为
,求
的长.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90126f6e9df1cf36733e0d70fb0def84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3b5cd3b941724ad6fe09c881b2ac6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39748ea77d8f5b48fbfbe16a717de41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4591fba47a56adf48615c146242406d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44be92f38e063a01b8cd67418815cd.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572961266122752/1572961272832000/STEM/d0cb6e413c474c1688e4ce397affa845.png)
(Ⅰ)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d86a0a3e867a448094f74a54a1fee64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f88df2cb9c468e9bb47640e50e395d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2335610d92b3b6cddc6460ffd3af7a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fc86ad68b8f2877570ee85daa40ed6.png)
您最近一年使用:0次
8 . 选修4-1:几何证明选讲
如图,四边形
是⊙
的内接四边形,延长
和
相交于点
,
,
.
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/bab05a6b70914409b9ccc233459c2dce.png)
(Ⅰ)求
的值;
(Ⅱ)若
为⊙
的直径,且
,求
的长.
如图,四边形
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/796242376e8240199aefe3b7af00b0fc.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/34f255d17a534d258a71d8f3ff882796.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/d6ed371acc6e4996b2f42a8c118b5be4.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/171fffbca4f94670ba7239c3c5b10863.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/ad27fa310b8c42c894396f127548e31e.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/33e0c83893404c4182d1fad333f55b4a.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/2f608b8367084b3db743d06466930c68.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/bab05a6b70914409b9ccc233459c2dce.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/2b5e290f300c44e1ac1b90735049377c.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/0e4d178913b0425dac9efb078d769209.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/34f255d17a534d258a71d8f3ff882796.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/308884b466fa4954b7c6dfacea944e12.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572259485089792/1572259491373056/STEM/2da0e5184594431d821ea9176dd4f1a5.png)
您最近一年使用:0次
2016-12-03更新
|
20次组卷
|
3卷引用:2016届广东省广州六中等六校高三第一次联考理科数学试卷
13-14高三上·宁夏银川·阶段练习
9 . 如图,已知
切⊙
于点E,割线PBA交⊙
于A、B两点,∠APE的平分线和AE、BE分别交于点C、D.求证:
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/a8ee2f252b6e49ac876894fc8562434d.png)
(Ⅰ)
;
(Ⅱ)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/a8ee2f252b6e49ac876894fc8562434d.png)
(Ⅰ)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/0ab87b06907e49b9ba7a83791dd99339.png)
(Ⅱ)
![](https://img.xkw.com/dksih/QBM/2014/1/2/1571454908710912/1571454914494464/STEM/402c81717bd247ffaa0225f0286085ac.png)
您最近一年使用:0次
2016-12-02更新
|
591次组卷
|
3卷引用:2016届广东省深圳市南山区高三上学期期末文科数学试卷