如图,在
中,连接
,以
为直径的半圆O,从
与
共线开始绕点D逆时针旋转,直线
与
第一次重合时,停止运动,点K是半圆O的中点,连接
,当
,
与线段
有交点时,设交点分别为点P和点Q,已知
,
,
.
的度数;
(2)当点Q在
上时,设
,
,请求出y与x的关系式;
(3)当
与
重合时,求半圆O与
所围成的弓形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9ace2f91c1676ab677f852e76bb517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d585bce731ba5992968de4803f0b606.png)
(2)当点Q在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5ad6368dd902909c197eb60c52176e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7346f06c31ae1bb178cb06166fbaca3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
更新时间:2024-06-08 18:15:56
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,一次函数
的图象与反比例函数
的图象交于点
,与y轴交于点B,与x轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/cf9aaeef-7911-44ec-8a0c-ea1be7660443.png?resizew=182)
(1)求k与m的值;
(2)点
为x轴正半轴上的一点,且
的面积为
,求a的值.
(3)在(2)的条件下,在平面内是否存在一点Q,使以点A,B,P,Q为顶点的四边形为平行四边形?若存在,请直接写出点Q的坐标;不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0189d4c890b2f150fc4ab7664a86294c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1832c751a9b1a258301e0bb81838e778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1312db36d8ae5d9cea112c17c29ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24f172a287592897ea4378a2ad29013.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/cf9aaeef-7911-44ec-8a0c-ea1be7660443.png?resizew=182)
(1)求k与m的值;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe4b59c2f40deafebe46420af82cf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
(3)在(2)的条件下,在平面内是否存在一点Q,使以点A,B,P,Q为顶点的四边形为平行四边形?若存在,请直接写出点Q的坐标;不存在,请说明理由.
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【推荐2】如图,在平行四边形ABCD中,过A点作AE⊥BC于点E,过BC上一点F作FH⊥AB于点H,交AE于点K,连接AC.过F作FG⊥AC于点G,连接EG.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/836cd183-bc02-46cf-8b15-388d6737f297.png?resizew=243)
(1)若AC=BC=15,AB=3
,求AE的长.
(2)若KE=BE,求证:AG+GF=
EG.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/836cd183-bc02-46cf-8b15-388d6737f297.png?resizew=243)
(1)若AC=BC=15,AB=3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
(2)若KE=BE,求证:AG+GF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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名校
【推荐3】如图,在Rt△ABC中,∠ACB=90°,AC=3,AB=5.点P从点A出发,以每秒5个单位
长度的速度沿AC方向运动,过点P作PQ⊥AB于点Q,当点Q和点B重合时,点P停止运动,以AP和AQ为边作▱APHQ.设点P的运动时间为t秒(t>0)
(1)线段PQ的长为 .(用含t的代数式表示)
(2)当点H落在边BC上时,求t的值.
(3)当▱APHQ与△ABC的重叠部分图形为四边形时,设四边形的面积为S,求S与t之间的函数关系式.
(4)过点C作直线CD⊥AB于点D,当直线CD将▱APHQ分成两部分图形的面积比为1:7时,直接写出t的值.
长度的速度沿AC方向运动,过点P作PQ⊥AB于点Q,当点Q和点B重合时,点P停止运动,以AP和AQ为边作▱APHQ.设点P的运动时间为t秒(t>0)
(1)线段PQ的长为 .(用含t的代数式表示)
(2)当点H落在边BC上时,求t的值.
(3)当▱APHQ与△ABC的重叠部分图形为四边形时,设四边形的面积为S,求S与t之间的函数关系式.
(4)过点C作直线CD⊥AB于点D,当直线CD将▱APHQ分成两部分图形的面积比为1:7时,直接写出t的值.
![](https://img.xkw.com/dksih/QBM/2018/9/29/2042805394849792/2043427125223424/STEM/39ea93114c4145d5b3bf6f89e8c839f5.png?resizew=181)
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真题
【推荐1】如图,在△ABC中,∠C=90°,AC+BC=9,点O是斜边AB上一点,以O为圆心2为半径的圆分别与AC、BC相切于点D、E.
![](https://img.xkw.com/dksih/QBM/2013/9/12/1573682784567296/1573682790694912/STEM/65b3453e6bd0490e98fb0eac29735b11.png)
(1)求AC、BC的长;
(2)若AC=3,连接BD,求图中阴影部分的面积(
取3.14).
![](https://img.xkw.com/dksih/QBM/2013/9/12/1573682784567296/1573682790694912/STEM/65b3453e6bd0490e98fb0eac29735b11.png)
(1)求AC、BC的长;
(2)若AC=3,连接BD,求图中阴影部分的面积(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d5adfe85535b699655d5ed2f3322d8.png)
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【推荐2】如图,在
中,
是
的重心,
的延长线交边
于点
.
,使得
经过点B,且与
相切于点G;(不写作法,保留作图痕迹)
(2)在(1)的条件下,设
与半径
相交于点D,
交
于点E,连接
.若
,则弓形
的面积为______.(如需画草图,请使用图2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/d50703c46b6153945d718b198f03b4b5.png)
(2)在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.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/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e88b9320877fd308733e293d3946c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cc4309dcef077fbcf60099f47b7b37.png)
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【推荐1】如图,已知
∽
,且
、
是角平分线,
、
是中线.求证:
∽
.
![](https://img.xkw.com/dksih/QBM/2019/12/13/2354132916019200/2354484814749696/STEM/cbc13f8785d148acbce7e4ba378b307d.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e470610434d0fd21efd9d23801c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3134b680f7fdc301145432c94d557759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2019/12/13/2354132916019200/2354484814749696/STEM/cbc13f8785d148acbce7e4ba378b307d.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/2019/12/13/2354132916019200/2354484814749696/STEM/7b7fee62dd4444ed92955f03975bc012.png?resizew=158)
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【推荐2】如图,在
中,
,D是
的中点,
经过A、B、D三点,
的延长线交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/4e1972ff-528c-4da2-a97f-61d7b1964859.png?resizew=140)
(1)求证:
;
(2)
与
相切于点E,交
的延长线于点F,若
,求
的直径;
(3)在(2)的条件下,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/4e1972ff-528c-4da2-a97f-61d7b1964859.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553a93e0b6156befa00b50bdfaef95d9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/ddd02e71cdbee9a36fa697e3b9168afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55e5294e8d5332a027d5ef8cdd0b91c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf01cce24cae39fa27acb2d0d7c5f4c5.png)
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【推荐3】问题情境:综合与实践课上,老师让同学们以“正方形纸片的折叠”为主题开展数学活动,下面是同学们的折纸过程:
动手操作:步骤一:将正方形纸片
(边长为4cm)对折,使得点A与点D重合,折痕为
,再将纸片
展开,得到图1.
步骤二:将图1中的纸片
的右上角沿着
折叠,使点D落到点G的位置,连接
,
,得到图2.
步骤三:在图2的基础上,延长
与边
交于点H,得到图3.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/03d70501-8396-4847-9141-8d1fcfe47259.png?resizew=529)
问题解决:
(1)在图3中,连接
,则
的度数为______,
的值为______;
(2)在图3的基础上延长
与边
交于点M,如图4,试猜想
与
之间的数量关系,并说明理由;
(3)将图4中的正方形
纸片过点G折叠,使点A落在边
上,然后再将正方形纸片
展开,折痕
分别与边
,
交于点P,Q.求
的长.
动手操作:步骤一:将正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
步骤二:将图1中的纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
步骤三:在图2的基础上,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/03d70501-8396-4847-9141-8d1fcfe47259.png?resizew=529)
问题解决:
(1)在图3中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8c2c9aeb218fee9281ec7e589ab60e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e85d04715748579b1c84a35806462a6.png)
(2)在图3的基础上延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
(3)将图4中的正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/27e66b12019cdf68327d34c90dff7c04.png)
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【推荐1】如图,点
为长为5的线段
上一点,且
,过
作
于
,且
,以
为邻边作矩形
,将线段
绕点B顺时针旋转,得到线段
,优弧
交
于
,交
于
,设旋转角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)若扇形
的面积为
,则
的度数为_______.
(2)连接
,判断
与扇形
所在圆
的位置关系,并说明理由.
(3)设
为直线
上一点,沿
所在直线折叠矩形,若折叠
后所在的直线与扇形
所在
的相切,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ea9d3df7c2bcdf135dedd1554fb82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe1d9a3b470811ec3729475a363ee28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c1c07115a06b6efc6f200d088b20fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)若扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d7b599244adb27abd77545fe639612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844d5ff86a3c70b93bf2957716743198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
(3)设
![](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/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/bdb3006b-0f77-4357-bac8-d709c10d9ec7.png?resizew=286)
您最近一年使用:0次
解答题-证明题
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较难
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【推荐2】如图,AB为☉O直径,半径为2,点D为弧
的中点,点C在☉O上由点A顺时针向点B运动(点C不与点A,点B重合),连接AC,BC,CD,AD,BD.
(1)求证:CD是∠ACB的角平分线;
(2)求CD的长x的取值范围(直接写出答案)
(3)四边形ADBC的面积S是线段CD的长x的函数吗?如果是,求出函数解析式,并求出S的最大值,如果不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
(1)求证:CD是∠ACB的角平分线;
(2)求CD的长x的取值范围(直接写出答案)
(3)四边形ADBC的面积S是线段CD的长x的函数吗?如果是,求出函数解析式,并求出S的最大值,如果不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/11/12/2591461620891648/2596216658690048/STEM/5817124a-c14d-4ace-8b20-b7ac0b0b4b76.png)
您最近一年使用:0次