如图,已知
为
的直径,
是弦,且
于点
.连接
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/12/22/2625935377965056/2630927648006144/STEM/24ad9584-d695-437d-8f66-db33e68eaede.png)
(1)求证:
;
(2)若
,
,求
的直径.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/12/22/2625935377965056/2630927648006144/STEM/24ad9584-d695-437d-8f66-db33e68eaede.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4163013ce2054e7deaa65ff70561b4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa83176cc4c308f8e28a6d141a96e576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
更新时间:2021-01-07 12:18:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在等腰直角
中,
,点
是线段
上不与点
,
重合的动点,连接
并延长至点
,使
,过点
作
,垂足为点
.
(1)当点
,
位于点
的异侧时,问线段
,
,
之间有何数量关系?写出你的结论并证明;
(2)当点
,
位于点
的同侧时,若
,
,请在备用图中画出图形,并求
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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fa1aa5a7a5bb172ed4603f17c8b2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/ecb88078-0a6e-4897-b963-c8f44589bbd5.png?resizew=452)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71dbcf2de0a62e09422cf8bad5ebfe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
是
边上的高线,
是
边上的中线,连接
,
.
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127348728070144/3130084908916736/STEM/5209982aef934629a3b294f0783a469c.png?resizew=209)
(1)求证:
:
(2)已知
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://img.xkw.com/dksih/QBM/2022/12/9/3127348728070144/3130084908916736/STEM/5209982aef934629a3b294f0783a469c.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720106e388d8dd7ea24c425f52f6e32b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
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解答题-作图题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897961958064128/2899793617887232/STEM/8e05bbb0-1194-4a44-93a1-a0fb6b84ecdc.png?resizew=205)
(1)使用直尺和圆规,作线段BC的垂直平分线l,交BC与点E,交AB于点F;(基本作图,保留作图痕迹,不写作法,标明字母)
(2)在(1)的条件下,连结CF,且
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897961958064128/2899793617887232/STEM/8e05bbb0-1194-4a44-93a1-a0fb6b84ecdc.png?resizew=205)
(1)使用直尺和圆规,作线段BC的垂直平分线l,交BC与点E,交AB于点F;(基本作图,保留作图痕迹,不写作法,标明字母)
(2)在(1)的条件下,连结CF,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,长方形纸片
,
,将长方形纸片折叠,使点
与点
重合,点
落在点
处,折痕为
.
(1)求证:
.
(2)若
,求
的度数.
(3)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/39e210795a966bd5dc1293479ab1988b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/68f6a5dc-f54d-4562-8efc-b51a96d34378.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc652299783cc3cd709eb1a9eae09fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623be093e5fb090012aab59680dbc874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在△ABC中,∠C = 90°,以点C为圆心,CA长为半径的圆交AB于点D.
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741215937118208/2799426324160512/STEM/aeaac7ab-04ab-4226-bd8c-beddd57c27ef.png)
(1)若∠B = 24°,求
的度数;
(2)若D是AB的中点,AB = 3,求阴影部分的面积;
(3)若AD·AB= 12,求AC的值.
![](https://img.xkw.com/dksih/QBM/2021/6/12/2741215937118208/2799426324160512/STEM/aeaac7ab-04ab-4226-bd8c-beddd57c27ef.png)
(1)若∠B = 24°,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
(2)若D是AB的中点,AB = 3,求阴影部分的面积;
(3)若AD·AB= 12,求AC的值.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,AC为⊙O的直径,CD为⊙O的弦,BE⊥CD于点E,
=
.
(1)求证:BE的⊙O切线.
(2)若AD=4,EC=1,求BD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e712e6bcf935c4b58fcbd75fc7a38622.png)
(1)求证:BE的⊙O切线.
(2)若AD=4,EC=1,求BD的长.
![](https://img.xkw.com/dksih/QBM/2021/12/23/2878526557978624/2879506624258048/STEM/da31ff9f-ed1f-48cc-8f4b-fc09935ab6d3.png?resizew=153)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/67865cde-b389-4c48-b6ac-4a8d9b7e1a8a.png?resizew=595)
(1)【动手操作】
如图1,过点P作直线a的垂线时,小颖先将一圆形透明纸片对折得到折痕
,然后让端点A与点P重合,端点B落在直线a上,标出直线a与圆形纸片的交点C,连接
,则
垂直直线a.她的作图依据是______.
(2)【解决问题】
如图2,记这个圆形纸片的圆心为O,过点A作直线交直线a于点D,过点C作
交
于点F,交
于点E,连接
,若
.
①求证:
是
的切线;
②若
,
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/67865cde-b389-4c48-b6ac-4a8d9b7e1a8a.png?resizew=595)
(1)【动手操作】
如图1,过点P作直线a的垂线时,小颖先将一圆形透明纸片对折得到折痕
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
(2)【解决问题】
如图2,记这个圆形纸片的圆心为O,过点A作直线交直线a于点D,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0651dd92f5307e6fa72af7db782b567.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d875f0d9448d025bb6dfad47dd55fad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d00be47dcb89793f14a2fd10f4c522b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知:如图,在
中,弦
与
相交于点
,
,给出下列信息:①
;②
是
的直径;③
.
(1)请在上述
条信息中选择其中两条作为条件,剩下的一条作为结论.你选择的条件是 ,结论是 (只要填写序号).判断此命题是否正确,并说明理由;
(2)在(1)的情况下,若
,求
的直径.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa18c2a78c400c80a5760743f31771c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b17b275d892a076f768524c400a6f5.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/6e5b539eb8f15934cad157e98eeb5e2a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/b0117fd2-b6dd-4bb8-adb2-f91cfd78bfba.png?resizew=149)
(1)请在上述
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(2)在(1)的情况下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次