如图,在
中,
,以
为直径的
交
于点
,
垂直于过点
的切线,垂足为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/dbf21480-5d3f-47ac-b5df-b4f3acffc146.png?resizew=203)
(1)求证:
平分
;
(2)若
,
,则
的半径长为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/2022/10/26/dbf21480-5d3f-47ac-b5df-b4f3acffc146.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b62a9e9c6cf28516f045705e3a69c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
更新时间:2021-05-31 09:22:19
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
平分
交
于点E,
是
的外接圆,过点E作
于点D交
的延长线于点P.
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b84c9d873289f99d8eb733d12899280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1074950ddaa33567594e3e1e2715a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638d9cccb679214718224c3088ed4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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名校
【推荐2】如图,在
中,
,点D在
上,以
为直径作
与
相切于点E,连接
并延长交
的延长线于点F.
;
(2)若
,
,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22437a2a3402609bfd4054a9f2b6c685.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce84f6062f12bf6ef42d7b733cd2248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-证明题
|
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(0.65)
【推荐3】在探究一条弧所对的圆周角与它所对的圆心角之间的关系时,分三种情况进行讨论:①圆心在圆周角的一条边上;②圆心在圆周角的内部;③圆心在圆周角的外部.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988219106525184/2990100636704768/STEM/a65d388f-cab3-49c2-87aa-ccaea7326335.png?resizew=702)
(1)在图①中,通过测量∠BOC=56°,∠BAC=28°,由此可得
,在图②中,连接AO,并延长AO交⊙O于点D,可得
,请猜想图③中∠BAC与∠BOC的数量关系,并给予证明.
(2)在图④中,若∠BOC=60°,连接BC,当AC=BC=2时,请过点B画出⊙O的切线,交AC的延长线于点D,并直接写出BD的长.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988219106525184/2990100636704768/STEM/a65d388f-cab3-49c2-87aa-ccaea7326335.png?resizew=702)
(1)在图①中,通过测量∠BOC=56°,∠BAC=28°,由此可得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac754abc67f13066da61f6638348ddc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac754abc67f13066da61f6638348ddc4.png)
(2)在图④中,若∠BOC=60°,连接BC,当AC=BC=2时,请过点B画出⊙O的切线,交AC的延长线于点D,并直接写出BD的长.
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解答题-证明题
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适中
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【推荐1】如图,在
中,
为
的直径,
为
上一点,
是弧
的中点,过点
作
的垂线,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720380719030272/2731317539053568/STEM/8aee7334-3099-4059-90a1-43eb83f3f30f.png?resizew=181)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720380719030272/2731317539053568/STEM/8aee7334-3099-4059-90a1-43eb83f3f30f.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb42439079fa563100decbad833e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47203dcfc470ce817e4c8450621847f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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|
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(0.65)
名校
【推荐2】如图,直线
反比例函数
)交于点
,并与x轴,y轴交于点C,B.
(2)连接
,求
的值.
(3)点D在y轴的负半轴上,以点D,C,B,若组成的三角形与
相似,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888cf62de648e7c3694e6258f20d62ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36828be50c7405bb08ec09c64c80bd5a.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739734ca1058d32edcbc02401574cbb5.png)
(3)点D在y轴的负半轴上,以点D,C,B,若组成的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173bc7a36757d77f01213411edd25241.png)
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【推荐3】(1)【探索发现】
如图1,在正方形ABCD中,点M,N分别是边BC,CD上的点,∠MAN=45°,若将△DAN绕点A顺时针旋转90°到△BAG位置,可得△MAN≌△MAG,若△MCN的周长为8,则正方形ABCD的边长为 .
(2)【类比延伸】
如图2,在四边形ABCD中,AB=AD,∠BAD=120°,∠B+∠D=180°,点M,N分别在边BC,CD上的点,∠MAN=60°,请判断线段BM,DN,MN之间的数量关系,并说明理由.
(3)【拓展应用】
如图3,在四边形ABCD中,AB=AD=2,∠ADC=120°,点M,N分别在边BC,CD上,连接AM,MN,AN,△ABM是等边三角形,AM⊥AD于点A,∠DAN=15°,请直接写出△CMN的周长.
如图1,在正方形ABCD中,点M,N分别是边BC,CD上的点,∠MAN=45°,若将△DAN绕点A顺时针旋转90°到△BAG位置,可得△MAN≌△MAG,若△MCN的周长为8,则正方形ABCD的边长为 .
(2)【类比延伸】
如图2,在四边形ABCD中,AB=AD,∠BAD=120°,∠B+∠D=180°,点M,N分别在边BC,CD上的点,∠MAN=60°,请判断线段BM,DN,MN之间的数量关系,并说明理由.
(3)【拓展应用】
如图3,在四边形ABCD中,AB=AD=2,∠ADC=120°,点M,N分别在边BC,CD上,连接AM,MN,AN,△ABM是等边三角形,AM⊥AD于点A,∠DAN=15°,请直接写出△CMN的周长.
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446067924688896/2446217585016832/STEM/ad4a49bb15d5414ba5ef734b0327ebcf.png?resizew=496)
您最近一年使用:0次