1 . 【阅读材料】我们把一组对边平行,另一组对边相等且不平行的四边形叫做等腰梯形.
【问题解决】已知在等腰梯形
中,
,
,对角线
相交于点T.
(1)如题图1,若
,以点T为圆心,
长为半径作圆,求证:直线
是
的切线;
的中点,求证:
;
的中点,
交AC于点P,若
,直接写出
的长 .(用含字母a的代数式表示)
【问题解决】已知在等腰梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
(1)如题图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78192b9e9d4e38175e840233749443bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817a419430d9951cbdb89b657b21bcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a81be7fd9af59fef27fcf46aebb86b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff96538df3f9043fcb0cc16057c5802e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07789d6a8259ac89144caa816aaaf47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918ba2f8c61aaff76bf4cc9fc64c89bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2 . 如图(1),
于点C,点E在线段
上,且
,
,连接
、
.
;
(2)如图(2)连接
,O为线段
中点,过点C作
于点F,连接
,
①连接
,求证:
;
②求
的大小.
(3)在第(2)的条件下延长
交
于点H,判断线段
与线段
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ca0f2b2b40440365fcce22ac32c0ef.png)
(2)如图(2)连接
![](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/80125e48498ac9c548732e2af1b1758d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2332c0698d463d56f4a31546231fd034.png)
(3)在第(2)的条件下延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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3 . 如图,在矩形
中,
,E,F是对角线
上的动点,且
,M,N分别是边
,边
上的动点.
(1)如图2,连接
交
于O点,若E、F、M、N分别是
、
、
、
的中点,求证:四边形
是平行四边形;
(2)当四边形
是正方形时,用无刻度的直尺和圆规在图3中作出符合题意的图形并求
的长;
(3)当
时,且四边形
是矩形,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7cbf99f10ad16bbc2f5b67f9f2d42a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/d3bb004f-75a4-4a1f-bdb2-e40ef6fc41c3.jpg?resizew=370)
(1)如图2,连接
![](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/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8422adfe5e7e7a612b39a718a32323d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
您最近一年使用:0次
2023-09-05更新
|
154次组卷
|
3卷引用:广东省佛山市南海区双语实验中学2023-2024学年九年级上学期月考数学试题
4 . 在菱形
中,点
,
,
,
分别为
,
,
,
的中点.
(1)如图所示,求证:四边形
为矩形;
(2)已知
,
,作
的角平分线
交
于点
,作
,
的中点
,
连接
交
与点
,交
于点
,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d4d15e56d9abe972aa29633bdd4760.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ca8e939a13b0a8964967b7433707f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f35635647a3af0f1a845026d4c9173c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/807cd76d-a3df-4495-b914-60b65c352036.png?resizew=178)
(1)如图所示,求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f02b9e9c9df9b66587d59d898585b0d.png)
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5 . 在正方形
中,点
、
分别是
、
上的中点,连接
、
,
与
相交于点
(如图1)
(1)求证:
;
(2)如图2,连接
,取
中点
,连接
(如图
),若正方形边长为
,则
______(直接写出答案);
(3)平移图1中线段
,使点
与点
重合,点
在线段
的延长线上,连接
,取
中点
,连接
(如图
),请猜想线段
与线段
的数量关系,并证明你的猜想.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/36c5369a-d5e1-4e8e-9cbe-9f1497906ed3.png?resizew=430)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89545e377e0446b359b644f3ad4e513.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db673db300497a09152ea6431b3587ca.png)
(3)平移图1中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.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/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0e1d595a89cc353b2a3dd599453eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0e1d595a89cc353b2a3dd599453eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9d82a9ef2423170318d52110a39f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8993f5f334e712276cfff328d6edcb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9d82a9ef2423170318d52110a39f91.png)
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6 . 平行四边形的中点四边形是___________ .
您最近一年使用:0次
7 . 我们定义:若一个凸四边形的两条对角线相等,则称这个四边形为等对角线四边形.如矩形,正方形都是等对角线四边形.
(1)如图
,已知点
,
,
在格点(小正方形的顶点)上,请在方格图中画出所有的等对角线四边形
,使点
在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/96f1bf44-cee4-4934-9c04-bef6427b6bab.png?resizew=163)
(2)如图
,已知等对角线四边形
中,
,
,
,
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/f74cb36e-0fa6-4b18-b905-103bd4dfd9a1.png?resizew=151)
(3)如图
,已知凸四边形
中,对角线
,
交于点
,点
,
分别为边
,
的中点,连接
,分别与对角线
,
交于点
,
,若
为等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/3d5256e3-3606-45af-b3c4-6e27a526bb4b.png?resizew=152)
①求证:四边形
是等对角线四边形;且
.
②试猜想
与
的大小关系,并请证明,你的猜想.
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414656636a840bbb9a031d6103239fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/96f1bf44-cee4-4934-9c04-bef6427b6bab.png?resizew=163)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7855d1e3b0547de1d0ea11dfd20161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb6cedd231c8804fb9009dd041e4b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b82fa8f506f8099ca06c36c706db479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7ac8bffd13ffdbd94a474a7f7ae8b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/f74cb36e-0fa6-4b18-b905-103bd4dfd9a1.png?resizew=151)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25b2bbf7e0d8ad8306348d9057671f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/701f3b0e2bedfe5195443459072d798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452d97902e5a8ef1d16625bff887fbf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/21/3d5256e3-3606-45af-b3c4-6e27a526bb4b.png?resizew=152)
①求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1a20ba9f5de28ccf53346af74c6a26.png)
②试猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460617c1df533a45aad5d80e702ccf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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8 . 如图,在等边△ABC中,D是AC的中点,则点D与以AB为直径的⊙O的位置关系是( )
![](https://img.xkw.com/dksih/QBM/2022/9/9/3062659820683264/3067781194301440/STEM/1ea1a7f3b9c441d9b22bcceec53a404e.png?resizew=125)
![](https://img.xkw.com/dksih/QBM/2022/9/9/3062659820683264/3067781194301440/STEM/1ea1a7f3b9c441d9b22bcceec53a404e.png?resizew=125)
A.圆上 | B.圆内 | C.圆外 | D.不能确定 |
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2022-09-16更新
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606次组卷
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4卷引用:广东省广州市海珠区2022-2023学年九年级下学期开学测数学试题
广东省广州市海珠区2022-2023学年九年级下学期开学测数学试题浙江省温州市岩头片区2021-2022学年九年级上学期期中数学试题(已下线)专题24.41 《圆》全章复习与巩固(巩固篇)(专项练习)-2022-2023学年九年级数学上册基础知识专项讲练(人教版)(已下线)专题3.44 圆(全章复习与巩固)(巩固篇)(专项练习)-2022-2023学年九年级数学下册基础知识专项讲练(北师大版)
名校
9 . 如图,
,
,延长
至点
,使
,四边形
为正方形,连接
交
于
.
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021726030675968/3040088895307776/STEM/e16c21fc0317413cafe632065a058ac3.png?resizew=193)
(1)求证:
为
的中点;
(2)求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557437a8641a61bf64c1e40f2bbf72a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be86349e06431647f8e359d9bd07700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/7/13/3021726030675968/3040088895307776/STEM/e16c21fc0317413cafe632065a058ac3.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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真题
10 . 一个玻璃球体近似半圆
为直径,半圆
上点
处有个吊灯![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08853507633615a8fe733731eb242f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98c9d6769bd26882a948da12f45d16e.png)
的中点为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a005759d298fe360651f7762e513f02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/ac43dbda-c20f-47a7-a5c3-4544e51ede98.png?resizew=176)
(1)如图①,
为一条拉线,
在
上,
求
的长度.
(2)如图②,一个玻璃镜与圆
相切,
为切点,
为
上一点,
为入射光线,
为反射光线,
求
的长度.
(3)如图③,
是线段
上的动点,
为入射光线,
为反射光线交圆
于点
在
从
运动到
的过程中,求
点的运动路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4431065d83e01168bc4c3e6648381a5.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/08853507633615a8fe733731eb242f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98c9d6769bd26882a948da12f45d16e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cceaf86bd3df83664bf212a7e3205458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a005759d298fe360651f7762e513f02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/2d543e10-8885-470f-b169-a8c457377158.png?resizew=169)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/4417092c-90d6-4475-b011-c85d1246dbdd.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/ac43dbda-c20f-47a7-a5c3-4544e51ede98.png?resizew=176)
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34430d748cc284f60c1a258e893ba470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图②,一个玻璃镜与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9d2abf13c2842f58654abf73c6b4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79748ee3d1a10ce1314ec998dc80b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
(3)如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0712c5a4726bc2888f83bb11d8a399a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/359e391ede9940746f94475527d862ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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