1 . 【选修4-1:几何证明选讲】
如图,已知圆上的弧
,过点
的圆的切线
与
的延长线交于
点.
![](https://img.xkw.com/dksih/QBM/2015/12/22/1572379801321472/1572379807793152/STEM/29a338a4b03445b8af5ca50d6467db10.png)
求证:(1)
;
(2)
.
如图,已知圆上的弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d153474afe208d90cc904f77f4579379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5402fd66f25b025c2f89c0897354d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc0983721388501807b32c17ca08281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://img.xkw.com/dksih/QBM/2015/12/22/1572379801321472/1572379807793152/STEM/29a338a4b03445b8af5ca50d6467db10.png)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cccd81670438fe95436683b38680eda.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0f10c558c9651092742fc29c953f38.png)
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2016-12-03更新
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232次组卷
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2卷引用:2016届贵州省贵阳市一中高三上学期第三次月考文科数学试卷
2 . 选修4—1:几何证明选讲
如图,正方形
边长为2,以
为圆心、
为半径的圆弧与以
为直径的半圆
交于点
,连结
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/2b0f6c30d08f4e0cb3a387d46d38108a.png)
(1)求证:
;
(2)求
的值.
如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/2b0f6c30d08f4e0cb3a387d46d38108a.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/f517e292c11c41738576ba48ba458eee.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572303048089600/1572303053774848/STEM/b8c0ccf4209b4eb19bfe65d27a72052d.png)
您最近一年使用:0次
2016-12-03更新
|
189次组卷
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4卷引用:2016届宁夏银川一中高三上学期第三次月考理科数学试卷
3 . 如图,已知
与圆
相切于点
,经过点
的割线
交圆
于点
、
,∠APC的平分线分别交
、
于点
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/020aed35-4bf3-46e7-93d0-22a4e8ee31f1.png?resizew=247)
(1)证明:∠ADE=∠AED;
(2)若AC=AP,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/020aed35-4bf3-46e7-93d0-22a4e8ee31f1.png?resizew=247)
(1)证明:∠ADE=∠AED;
(2)若AC=AP,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce020c141e2db008dc7c8a27204a06b.png)
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4 . 选修4-1:几何证明选讲
如图,
是的⊙
直径,
与⊙
相切于
,
为线段
上一点,连接
、
, 分别交⊙
于
、
两点,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f11eb3d9-f4d4-4fe1-a689-e5998cd8db23.png?resizew=216)
(Ⅰ)求证:
、
、
、
四点共圆.
(Ⅱ)若
为
的三等分点且靠近
,
,
,求线段
的长.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f11eb3d9-f4d4-4fe1-a689-e5998cd8db23.png?resizew=216)
(Ⅰ)求证:
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929adbe2211b012b66fe725d478274c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929adbe2211b012b66fe725d478274c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
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|
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2卷引用:2016届辽宁省五校协作体高三上学期期初考试理科数学试卷
5 . 如图,圆O的直径CD=10cm,D为
的中点,CD交弦AB于P,AB=8cm,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197afd81df9ccd8d391538340cc2f4ee.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197afd81df9ccd8d391538340cc2f4ee.png)
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572256268853248/1572256274620416/STEM/52ce66d8240543319bd10561517770b2.png?resizew=128)
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6 . 选修4-1:几何证明选讲
如图,
是圆
的直径,
是圆
上两点,
与
相交于点
,
,
是圆
的切线,点
在
的延长线上,且
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/ba1427b3-a8d2-411d-a18d-702ae388248c.png?resizew=147)
(1)
四点共圆;
(2)
.
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/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbaa12e10837b302535b3331f08b2495.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/ba1427b3-a8d2-411d-a18d-702ae388248c.png?resizew=147)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54583088b8451cdc5ae13b739a8eebb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dfb0a85bb6aee4a1d8fc1abad4eecb.png)
您最近一年使用:0次
2016-12-03更新
|
338次组卷
|
3卷引用:2015届海南省高三5月模拟文科数学试卷
7 . 选修4—1:几何证明选讲
如图所示,已知
为圆
的直径,
,
是圆
上的两个点,
于
,
交
于
,交
于
,
.
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/7e180d77ee4f49aca871b830cc84e218.png)
(1)求证:
是劣弧
的中点;
(2)求证:
.
如图所示,已知
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/a11e65077ffd4dd48b476ba68244d817.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/e6c87cf5cce34e72a50148133d206cfe.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/10355130642544ed9d1784b72e9cd9cd.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/5d63cbc74281451bb43ffe8d27783fb3.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/e6c87cf5cce34e72a50148133d206cfe.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/89800fa25b97487983cbc85e40e3ec29.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/052fb066ffa34abab597914701633519.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/77783cb270414ad2970bba8b10131bf2.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/cdf464f9bdeb4cd28fd8ca93bf6364c2.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/4e2c630ff1e44f86b48579e2a78828cd.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/c7ffec25edc64790a31d6d3668f443be.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/2e15563283bf4306ba8f3ca3a826304d.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/369c3378dcbe47d3a1eef8b73bc7d096.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/7e180d77ee4f49aca871b830cc84e218.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/10355130642544ed9d1784b72e9cd9cd.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/77783cb270414ad2970bba8b10131bf2.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572056615280640/1572056621441024/STEM/4b7f584450464787856a4348d7b14951.png)
您最近一年使用:0次
2016-12-03更新
|
484次组卷
|
2卷引用:2015届辽宁省沈阳市高中三年级教学质量监测一理科数学试卷
8 . (几何证明选讲选做题)如图,圆
的直径
,直线
与圆
相切于点
,
于点D,若
,设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b363797455e171e5dff9193eb28cc9.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/9ccd5c41c921836b50f8e18abfdc5df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01dcbd171693a47c5b932a5e84de10c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b363797455e171e5dff9193eb28cc9.png)
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572027454300160/1572027459510272/STEM/57fdbddc02184ed7b6981aabc262cf00.png?resizew=196)
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12-13高三上·河北衡水·期末
9 . 已知C点在圆O直径BE的延长线上,CA切圆O于A点, DC是∠ACB的平分线交AE于点F,交AB于D点.
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571913545302016/1571913551282176/STEM/3461746b38d540a586df1e7db06b0745.png)
(Ⅰ)求
的度数.
(Ⅱ)若AB=AC,求AC:BC.
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571913545302016/1571913551282176/STEM/3461746b38d540a586df1e7db06b0745.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2014/12/3/1571913545302016/1571913551282176/STEM/17521d29a6c9445cb24193b60134489c.png)
(Ⅱ)若AB=AC,求AC:BC.
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