如图,在
中有一个内接四边形
,延长
与
的延长线相交于点
,求证:
;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcfbe4dd81a9cd85b2c5e6e10176306.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d831c9ba6d18774540e2aaa29132fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a467d2cad75d39b67c8204df70239147.png)
更新时间:2024-04-07 08:34:00
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相似题推荐
解答题-问答题
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适中
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名校
【推荐1】如图所示,
过
,
两点,分别交直线
和
于
,
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40630a669f4eedf626bc24851df10c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc04a440bacc73f06df361773b59331.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,
内接于
,
,点E在直径BD的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/d8350d15-9cd3-4eaf-b6e6-b6851c8faffd.png?resizew=171)
(1)求证:
是
的切线;
(2)若
,
①求阴影部分的面积;
②连接AO,试求以扇形OAB为侧面围成的圆锥的底面圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/d8350d15-9cd3-4eaf-b6e6-b6851c8faffd.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
①求阴影部分的面积;
②连接AO,试求以扇形OAB为侧面围成的圆锥的底面圆的半径.
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解答题-问答题
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名校
【推荐1】定义:有一个角是其对角一半的圆的内接四边形叫做圆美四边形,其中这个角叫做美角.
(1)如图1,若四边形
是圆美四边形,求美角∠A的度数.
(2)在(1)的条件下,若
的半径为
.
①求
的长.
②如图2,在四边形
中,若
平分∠BCD,求BC+CD的最大值.
(1)如图1,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/24/29c088ae-f36c-4db0-bb56-038c531cd0aa.png?resizew=521)
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解答题-作图题
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【推荐2】如图,已知点M是
的外心,在
的外部找一点D,使得点D到射线
和射线
距离相等,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/4da2a551-ec43-4cf0-b49c-29fef9b6a267.png?resizew=182)
(1)请用尺规作图的方法确定点D的位置(不写作法,保留作图痕迹);
(2)若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/e61318f92c8f9ea2945b8988b84bd492.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/4da2a551-ec43-4cf0-b49c-29fef9b6a267.png?resizew=182)
(1)请用尺规作图的方法确定点D的位置(不写作法,保留作图痕迹);
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2328312c8c92ce1cbbd154e44f6ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
【推荐1】如果两个相似三角形的对应边存在2倍关系,则称这两个相似三角形互为母子三角形.
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646034556723200/2653585723539456/STEM/1645afba-d860-4773-9445-8323e708d9f3.png)
(1)如果
与
互为母子三角形,则
的值可能为( )
A.2 B.
C.2或![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)已知:如图1,
中,
是
的角平分线,
.
求证:
与
互为母子三角形.
(3)如图2,
中,
是中线,过射线
上点
作
,交射线
于点
,连结
,射线
与射线
交于点
,若
与
互为母子三角形.求
的值.
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646034556723200/2653585723539456/STEM/1645afba-d860-4773-9445-8323e708d9f3.png)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1361c0f97b8e1252d8bf911f76c9d9a9.png)
A.2 B.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)已知:如图1,
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1ad79efa5d54d30f49f54673c06aee.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)如图2,
![](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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51db93dcdc7f70db8eba5c68cc42a26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbf5459b20ca890a47ebf8d51d90cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439d3adaf84ca01ccecbedc527f8dd34.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】已知:如图,在△ABC中,点D在边BC上,AE∥BC,BE与AD、AC分别相交于点F、G,
.
(1)求证:△CAD∽△CBG;
(2)连接DG,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882dcef20945a64e88bf3cb5bde10207.png)
(1)求证:△CAD∽△CBG;
(2)连接DG,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6eadbce6fb87bfb7e55d9a67a75c70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/8ff6953a-4eae-404c-988e-213098c63387.png?resizew=243)
您最近一年使用:0次