筒车在古代是进行灌溉的工具,是人类的一项古老的发明.如图①,其原理是利用流动的河水,推动水车转动,水斗满河水,将水提升,等水斗转至顶空后再倾人木槽,水流源源不断,流入田地,以利灌溉.如图②,筒车
与水面分别交于点A,B,筒车上均匀分布着若干盛水筒,P表示筒车的一个盛水筒.接水槽
所在的直线是
的切线,且与直线
交于点M,当点P恰好在
所在的直线上时.解决下面的问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/420cb64b-69bb-4fb7-8bd8-24bb754618e6.png?resizew=394)
(1)求证:
;
(2)若
,
,
,求BP的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/420cb64b-69bb-4fb7-8bd8-24bb754618e6.png?resizew=394)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46270f9adf0e2cbd54f96094966f80f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a109c829d652632a88ade6924fcda206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8511eeface9029eeaeaf60ec2c722d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64f0c2bb6e593e7c5e31710849d4fef.png)
2023·河南商丘·一模 查看更多[2]
更新时间:2023-04-17 14:12:33
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,点
、
在
上,点
在
上,
分别交
、
于点
、
,下列几个信息:①
;②
;③
.从上面三个信息中选择两个作为条件,剩余的一个作为结论组成一个真命题.
(1)你选择的条件是_______,结论是_______(填序号);
(2)证明你构造的命题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d440215e4ca391884e61b1017e329e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/df588c2f-01cb-45b6-88ba-ad0421345838.png?resizew=169)
(1)你选择的条件是_______,结论是_______(填序号);
(2)证明你构造的命题.
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解答题-作图题
|
适中
(0.65)
【推荐2】如图,在
的正方形网格中,每个小正方形的顶点叫做格点,
经过格点
,仅用无刻度的直尺在给定网格中画图.(保留作图痕迹)
(1)在图1中,画出
的中线
.
(2)在图2中,标出圆心
,并画出
的角平分线
.
(3)在图3中,画出
的
边上的高线
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd12b1e161e68c936f57aea483e20d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/afe93463-b6cc-4b8e-bcee-ab8cd98732d0.png?resizew=369)
(1)在图1中,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在图2中,标出圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)在图3中,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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解答题-证明题
|
适中
(0.65)
【推荐3】圆幂定理是平面几何中最重要的定理之一,它包含了相交弦定理、切割线定理、割线定理以及它们的推论,其中切割线定理的内容是:从圆外一点引圆的切线和割线,切线长是这点到割线与圆交点的两条线段长的比例中项.你能给出证明吗?
下面是证明的开头:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/9b2549aa-ce12-426b-be22-c9eee5babff1.png?resizew=674)
已知:如图①,点P为⊙O外一点,切线PA与圆相切于A,割线PBC与圆相交于点B、C.
求证:PA2=PB•PC
证明:如图②,连接AB、AC、B0、AO,
因为PA切⊙0于点A,
∴.PA⊥AO,∠PAB+∠BAO=90°.
阅读以上材料,完成下列问题:
(1)补充完成上面的证明过程;
(2)如图③,割线PDE与⊙O交于D、E,且PB=BC=4,PE=7,求DE的长.
下面是证明的开头:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/9b2549aa-ce12-426b-be22-c9eee5babff1.png?resizew=674)
已知:如图①,点P为⊙O外一点,切线PA与圆相切于A,割线PBC与圆相交于点B、C.
求证:PA2=PB•PC
证明:如图②,连接AB、AC、B0、AO,
因为PA切⊙0于点A,
∴.PA⊥AO,∠PAB+∠BAO=90°.
阅读以上材料,完成下列问题:
(1)补充完成上面的证明过程;
(2)如图③,割线PDE与⊙O交于D、E,且PB=BC=4,PE=7,求DE的长.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐1】如图,
是
的直径,点C,点D在
上,
,
与
相交于点E,
与
相切于点A,与
延长线相交于点F.
![](https://img.xkw.com/dksih/QBM/2020/8/17/2529771325317120/2529909642035200/STEM/eaf8b49b508448138e36e221309758d5.png?resizew=183)
(1)求证:
.
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/7d47084596d95a071d9959062872153d.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/8/17/2529771325317120/2529909642035200/STEM/eaf8b49b508448138e36e221309758d5.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67259153551e67bb3e035d11dc9334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6821c781ebf2576019e4daa88089e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知:在
中,
,垂足为E,点D在
上.
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729293469466624/2729358023458816/STEM/842f0a34-03ed-4509-8bd9-6b3f8afd46dc.png)
(I)如图①,若
,求
和
的大小;
(II)如图②,
,过点D作
的切线,与BC的延长线相交于点P,若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01898d4ad9757e07bddd6c26e59d1f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729293469466624/2729358023458816/STEM/842f0a34-03ed-4509-8bd9-6b3f8afd46dc.png)
(I)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be616944953f6020d8b7e41741d8e14a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17e587b7fcc3f7ef52c0a542141daa2.png)
(II)如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b953179bdc138b64dfc5a01614d9bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c071dd3e2285986beac27d1b2d1f1165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,
为半径
的中点,过
作
交弦
于点
,交
于点
,且
.
(1)求证:
是
的切线;
(2)连接
,
,求
的度数;
(3)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7780a372cd82d48d8c7cfd8ae9ae944d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/20ca3dd37272f50d52d8deb2a62dd820.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/8f4fba81-75c2-4cd2-9150-269d3b62f428.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ca1e91f0ccdcad461bf99744ea1ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47f81dd1fa2928195f938d9d6bf3e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-计算题
|
适中
(0.65)
【推荐2】如图,在
中,
.将
绕点
顺时针旋转一定角度得到
,点
在
上,点
在
的延长线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/71b904ef-6783-43af-9fe9-99ea0f72e869.png?resizew=152)
(1)填空:点
到
的距离为______;
(2)判断线段
与
的数量关系,并说明理由;
(3)当
时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35204c147c04615b1525a24d07c0ee91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95efaa2bb4dce0f63f4a23e0f29c5aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c962fe4f47732b8e6e83d17ff2b9af13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/71b904ef-6783-43af-9fe9-99ea0f72e869.png?resizew=152)
(1)填空:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa30a9ee227af2b387cf6e028c20d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次