如图,
是
的直径,
是
的切线,
交
于另一点D,且
,
;
(2)若E为
的中点,
,连接
,求
的长及阴影部分的面积.
![](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/9b1ec05e3cec27677ded7b4aecaa62d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bf58e5fea1189b33cf55d86335452f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03792cfb2b3540e9f8992d6daa36700d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bcc1b9b8eec9d79f0d507b968d9ade.png)
(2)若E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
更新时间:2024-05-16 10:05:35
|
相似题推荐
解答题-作图题
|
适中
(0.65)
名校
【推荐1】已知:如图△ABC中,
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/01dfdb03-0e78-48f5-8c95-cd6b6c5e8f75.png?resizew=160)
求作:线段AB上一点D,满足
.
作法:①以点A为圆心,
长为半径画圆;
②以点B为圆心,
长为半径画弧,交
于点P(不与点C重合);
③连接
交
于点D.
点D就是所求作的点.
(1)使用直尺和圆规,依作法补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:连接
,
∵
.
∴点C在
上,
∵点P在
上,
∴
( )(填推理的依据)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8ce3af4777d0267b103c1efe8513c5.png)
∴
( )(填推理的依据)
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2da1d50433aecf541991fd0f01773cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/01dfdb03-0e78-48f5-8c95-cd6b6c5e8f75.png?resizew=160)
求作:线段AB上一点D,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96181dd5eaf84d7f450d712fca6ef0d6.png)
作法:①以点A为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②以点B为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
点D就是所求作的点.
(1)使用直尺和圆规,依作法补全图形(保留作图痕迹);
(2)完成下面的证明.
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
∴点C在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
∵点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2b77fb27b3c6353ecee5bdb909e5ea.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8ce3af4777d0267b103c1efe8513c5.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1835ed4693fc1b53bf6af6154890aee4.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96181dd5eaf84d7f450d712fca6ef0d6.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知△ABC内接于⊙O,AB是⊙O的直径,点F在⊙O上,且点C是
的中点,过点C作⊙O的切线交AB的延长线于点D,交AF的延长线于点E.
(1)求证:AE⊥DE;
(2)若∠BAF=60°,AF=4,求CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129baba55117e8d5523746888024273a.png)
(1)求证:AE⊥DE;
(2)若∠BAF=60°,AF=4,求CE的长.
![](https://img.xkw.com/dksih/QBM/2019/4/25/2190017006526464/2190639681683456/STEM/a063cedabd3545428af2878b1db5424a.png?resizew=166)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
内接于
,
,点
为
上一点,连接
交
于点
,过点
作
的切线交射线
于点
,当
时:
![](https://img.xkw.com/dksih/QBM/2023/2/23/3180983488233472/3184318762835968/STEM/dea12ba4ffe54485a2f726567aff5c17.png?resizew=158)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b674a5618b36eb719392b819e7e604c7.png)
![](https://img.xkw.com/dksih/QBM/2023/2/23/3180983488233472/3184318762835968/STEM/dea12ba4ffe54485a2f726567aff5c17.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1027ada4d65882ab7ca8c62fb00e6da1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9abe9e42cf396cf527b4ccbd2fefe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6609cc372831939ad4beb3770b0b0ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,
°,
是圆
的直径,
是圆
的切线,切点为
,过点
作
,
为垂足,若四边形
是正方形,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d9a22edaf816e0975bd82f61de9df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec07464a1b5bc7a2cc338b1a13e0f4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ed8c01f0db1052e1f7e963651e8f76.png)
![](https://img.xkw.com/dksih/QBM/2019/1/4/2111593284190208/2167385016344576/STEM/2d086868711a4e0391818023a92432c8.png?resizew=215)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,半径给定的两圆同心,对小圆作三条切线,两条分别交于
、
、
三点,记以
、
、
为顶点的像扇形的区域面积分别为
、
、
,
的面积为
,求证:
为定值.
![](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/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/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8526a389756009e069e6e785a70dd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/3e7cedb6-aa68-4bc4-83bb-9f3aca18c1ad.png?resizew=137)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图1,四边形
内接于
,
为直径,点C作
于点E,连接
.
;
(2)若
是
的切线,
,连接
,如图2.
①证明四边形
是菱形;
②当
时,直接写出线段
,
与
围成阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a0e8a5b22995702a2618ae7c1262d7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65639672f444b3d4dc6fc4f357ddbd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
①证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](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/ed41d321f4c0717ac5b443aad942d9a7.png)
您最近一年使用:0次