1 . 为了测量一个光盘的半径,小明把直尺、光盘和三角尺按图所示放置于桌面上,并量出
.这张光盘的半径是______ cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/e2aac900-f142-4a74-9dbb-0cb382dedc9e.png?resizew=216)
您最近一年使用:0次
2024-02-25更新
|
70次组卷
|
2卷引用:陕西省西安市西北工业大学附属中学2023-2024学年九年级上学期期末数学试题
2 . 如图所示,过半径为
的
外一点P引圆的切线
,连接
交
于F,过F作
的切线,交
分别于D,E,如果
,
,则
的周长![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
______ ;
的度数______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf7177470d6bb1cb61218068bf80df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca068887d0a25263dd63a7945b56aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd4d3653347116b65c45b57223f96e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/c0c121aa-331a-405e-aaa4-75f5be62ca29.jpg?resizew=162)
您最近一年使用:0次
3 . 如图,
,
切
于点
,
,直线
切
于点
,交
于
,交
于点
,若
的周长是
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/025aac13-f373-47d8-8815-29c7294c28a4.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a8ceee5fa19abfde9173aac721b35b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b8e9157a918321232302175a7e02221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/025aac13-f373-47d8-8815-29c7294c28a4.png?resizew=190)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 如图,
是一个小型花园,
,
,花园的中间部分是一个圆形水池,该圆形水池与
的三边都相切,花园中的阴影部分为花圃,若从天空飘落下一片树叶.恰好落入花园里,则树叶落入水池的概率为__________ .(π的值取 3 )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0e4879ee117216d299bf4652ef2263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614c45b20f915ed6975e41a6ed23e3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/beec4dcf-aebe-4326-aff7-413158257ab2.png?resizew=104)
您最近一年使用:0次
5 . 如图,
是
的切线,
为切点,
经过圆心
,若
,则
的长度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6639f7a4-9ed8-4464-beb2-ab403fc49d9b.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3355e2fa0ac6c675f02ee36c3ced4f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9b78f01fb861d4bc8ea140d6c98931.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/e19b77c15bdff64b03a92cac5e7598eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6639f7a4-9ed8-4464-beb2-ab403fc49d9b.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图,在
中,
平分
交
于点
,以点
为圆心,
长为半径的
与
相切于点
,与
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/8489bf4c-d44b-4daa-9279-2c003c812d5f.png?resizew=127)
(1)求证:
是
的切线;
(2)若
,设
的面积为
,
的面积为
,
.求常数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/8489bf4c-d44b-4daa-9279-2c003c812d5f.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a904c6181b7b48f1b9dc25dbb59f738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72026f40223ccb47209573507d2472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
7 . 如图,
,
分别切
于点A,B,
,
那么
的长为 _____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57eea197b445137a2d7b7a95bc699b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6492050fa5718ce0bdf721f484000e4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
您最近一年使用:0次
2024-02-22更新
|
121次组卷
|
2卷引用:云南省昆明市官渡区官渡区云大附中星耀学校2022-2023学年九年级上学期期中数学试题
8 . 如图,在平面直角坐标系中,
是直角三角形,
,
,直角边
在
轴上,其内切圆的圆心坐标为
,拋物线
的顶点为A,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/1932b1b0-eba1-44f9-a8a1-dc00059827ef.png?resizew=251)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085bfd74028a49d4fb05d0c04371cbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0e1fb437a6c85b3d5ab4997b25515d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/1932b1b0-eba1-44f9-a8a1-dc00059827ef.png?resizew=251)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-02-20更新
|
91次组卷
|
2卷引用:山东省济宁市任城区2023-2024学年九年级上学期期末数学试题
9 . 如图,
、
分别切
于点A、B,
与
的延长线相交于点P.若
,
,则
的半径长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2373cd4db6faca95f8a05920586ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/40227e9a-c96a-4de0-954b-fdaff04b628c.png?resizew=142)
您最近一年使用:0次