如图,以
的一边
为直径作
,
与
边的交点恰好为
的中点
,与
边的交点为
,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/39d62eba-8f58-4980-b455-b4f270d984e5.png?resizew=137)
(1)求证:直线
是
的切线;
(2)若
,
,求弦
的长度.
![](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/3d97cdc586744d208b6f69c9813af977.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/39d62eba-8f58-4980-b455-b4f270d984e5.png?resizew=137)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f52b77868b1549d56f12a3fdba9018c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
更新时间:2023-03-04 10:53:40
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,
点在
上,
平分角
交
于
,过
作直线
的垂线,交
的延长线于
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/770c33e2-8329-49b5-b226-e7fd3654738c.png?resizew=179)
(1)求证:
;
(2)求证:直线
是
的切线;
(3)若
,
,求
的长.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/770c33e2-8329-49b5-b226-e7fd3654738c.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0a7177d7e13f12a4297498404345cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】定义:等腰三角形ABC,如果腰长是底边长的两倍,则称三角形ABC是等腰倍边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/b999f3e5-1b85-4a8f-bba6-5eec34af41dd.png?resizew=545)
(1)如图1,等腰倍边三角形ABC,AB=AC,BC=2,则AB= ,tanB= ;
(2)如图2,平行四边形ABCD,AB=8,对角线交于点O,若分成的四个以O为顶点的三角形中存在等腰倍边三角形,求AC+BD的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/b999f3e5-1b85-4a8f-bba6-5eec34af41dd.png?resizew=545)
(1)如图1,等腰倍边三角形ABC,AB=AC,BC=2,则AB= ,tanB= ;
(2)如图2,平行四边形ABCD,AB=8,对角线交于点O,若分成的四个以O为顶点的三角形中存在等腰倍边三角形,求AC+BD的值.
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,AB是⊙O的直径,点C是圆上一点,点D为
的中点,过点D作DE⊥AB于E,交BC于点F.
(1)求证:DF=BF
(2)若AC=6,⊙O的半径为5,求BD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f95817a8ecb0cdea4e20bfd9911ad1.png)
(1)求证:DF=BF
(2)若AC=6,⊙O的半径为5,求BD的长.
![](https://img.xkw.com/dksih/QBM/2021/12/4/2865108199931904/2866628528259072/STEM/631c3815-c527-42c6-96b3-f6c273714f04.png?resizew=189)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
内接于
,
是
的直径,点D在
上,且
平分
,过点D作
的切线交
的延长线于点E.
;
(2)若
,
,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](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/b53df2a88f461611f7159d0f2f8ef60e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fe56274388258542130678bbbd4255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,
是
的平分线,点
在
上,
经过
,
两点,交
于点
.
(1)求证:
是
的切线.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/dbc49dea-70cd-47cf-b365-8c67fccb8d88.png?resizew=126)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a5f360b30aea64e81f38dcd31cf3363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】将
的顶点A放在半圆O上,现从A与半圆O相切于点A(如图1)的位置开始,将
绕着点A顺时针旋转,设旋转角为
,旋转后
分别与半圆O交于点E,F,连接
(如图2).已知
,
,
.半圆O的直径为8.
(1)从图1到图2,判断弦
的长度是否变化,若不会变化,求
的长;若变化,说明理由.
(2)求
的中点M的运动路径长.
(3)当点F与点D重合时,判断
与半圆O的位置关系,并证明.
(4)在(3)中,求
与半圆O重叠部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9a415bdb7b4e1e35c18a9e53205392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/c4d57dca-14ac-447f-9a4b-d4c31a969739.png?resizew=282)
(1)从图1到图2,判断弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)当点F与点D重合时,判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(4)在(3)中,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,AB是
的直径,C点在
上,连接AC,
的平分线交
于点D,过点D作
交AC的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314522409893888/2315512695373824/STEM/f488646d415d4d419167c3b6ee004415.png?resizew=142)
(1)求证:DE是
的切线;
(2)若AB=10,
,连接CD,求CD的长.
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314522409893888/2315512695373824/STEM/f488646d415d4d419167c3b6ee004415.png?resizew=142)
(1)求证:DE是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若AB=10,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13171ee1bcd5648ed7c5ad56dd63942.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,
,
为
中点,将
绕点
逆时针旋转
后得到扇形
,动点
从点
出发在优弧
上运动,速度为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8a997ec86ca39fef94703375c4638d.png)
,运动到
点停止,设点
运动的时间为
.
的最大值是________,
面积的最大值是________
________;
(2)当
时,求证:线段
所在的直线与优弧
相切;
(3)点
到
所在的直线的距离小于
,直接写出扇形
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d26f8fc73fbab7cc44b11f02331841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b86b4c2c81a08573d578945d8e85586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee2baa858b867114b7a72165ca860f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8a997ec86ca39fef94703375c4638d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b7cf61c4c42defdb29df5f941b58a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fdfc856e4c80a7995957ef4845346f4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425e1c78f4d01ac5454c4ac1d21808a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d57c5366753582457cc87de6e90b302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280757052d9b68ac5b8dd95fcd329644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86d6f409e82ce944e89c3b7d203ef23.png)
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