矩形
的对角线
交于点
,
在
边上,连接
并延长交边
于点
.若
,
,
,求矩形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fa0a286a55692e4263a5993b01580b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1991f0a6612da392055846b5dc1dca11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ee7af832af9460f4775fa5c8c3620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2023/7/13/3279970660950016/3283644034760704/STEM/b9b597f34cde40edae452f6e08efe5f8.png?resizew=189)
更新时间:2023-07-18 16:53:48
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相似题推荐
解答题-证明题
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【推荐1】如图,
内接于半圆
,
是直径,过
作直线
,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/520082fa-df5d-418d-b709-6cd803fa57bd.png?resizew=197)
(1)求证:
是半圆的切线;
(2)已知弧
的中点
,要求过
作
于
.(尺规作图,保留作图痕迹)
(3)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4536721335272e9790104bf7cc7e92c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/520082fa-df5d-418d-b709-6cd803fa57bd.png?resizew=197)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)已知弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐2】如图,∠BAC=90°,AB=AC,BE⊥AD于点E,CF⊥AD于点F,求证:CF=EF+BE.
![](https://img.xkw.com/dksih/QBM/2022/6/27/3010175255961600/3071149312942080/STEM/311899f6e44f4724a24f0b52b3eabc68.png?resizew=152)
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【推荐1】某"综合与实践"小组开展了测量本校教学楼高度的实践活动.他们制定了测量方案,并利用课余时间完成了实地测量.他们在该教学楼底部所在的平地上,选取两个不同测点,分别测量了该旗杆顶端的仰角以及这两个测点之间的距离.为了减小测量误差,小组在测量仰角的度数以及两个测点之间的距离时,都分别测量了两次并取他们的平均值作为测量结果,测量数据如下表(不完整).
(1)两次测得
,
两点之间的距离平均值为_____________m.
(2)根据以上测量数据,请你帮助"综合与实践"小组求出教学楼
的高度.
课题 | 测量教学楼的高度 | |||
成员 | 组长:××× 组员:×××,××× | |||
测量工具 | 测量角度的仪器,皮尺等 | |||
测量 示意图 |
说明:线段 | |||
测量数据 | 测量项目 | 第一次 | 第二次 | 平均值 |
| 29.9° | 30.1° | 30.0° | |
| 15.2° | 14.8° | 15.0° | |
点 | 30.9m | 30.7m |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)根据以上测量数据,请你帮助"综合与实践"小组求出教学楼
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图,
ABC中,∠ACB=90°,∠BAC=30°,BC=4cm,点Q为从点B出发,以每秒1cm的速度沿B-A向点A运动,同时,点P从点B出发,沿折线BC-CA向点A运动,速度为2cm/s,其中一个点到达终点,另一个点也停止运动.设
BPQ的面积为S,P、Q的运动时间为t.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/76f46bf8-03c7-4342-9908-2003f0cd038f.png?resizew=110)
(1)AB=______,AC=______;
(2)当点Q在运动过程中,连接CQ,线段CQ能否有最小值;若有最小值,请求出这个最小值及此时时间t的值;
(3)求P、Q两点在运动过程中,
BPQ的面积S与运动时间t的数量关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/76f46bf8-03c7-4342-9908-2003f0cd038f.png?resizew=110)
(1)AB=______,AC=______;
(2)当点Q在运动过程中,连接CQ,线段CQ能否有最小值;若有最小值,请求出这个最小值及此时时间t的值;
(3)求P、Q两点在运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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【推荐1】如图,在矩形
中,对角线
的垂直平分线
分别交
、
、
于点E、O、F,连接
和
.
(1)求证:四边形
为菱形:
(2)若
,求菱形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/45e3821c-2352-4ac4-887f-62e865c53982.png?resizew=193)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154bca0523c33770045fed4426a9e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
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【推荐2】已知等腰△ABC中,∠BAC=90°,BC=4,P为BC上一动点,∠MPN=45°,PM、PN分别与AB、AC交于点E、F,且PM⊥AB,BE=x.
![](https://img.xkw.com/dksih/QBM/2020/1/1/2367798005604352/2368397109198848/STEM/03d97de4-6c57-4b61-8e5b-eb1a77de96a8.png)
(1)若P点在BC上运动,求四边形AEPF的面积(用x的代数式表示)并写出x的取值范围
(2)当点P在BC上运动时,△EPF能否为直角三角形,若能,请写出此时x的值;若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/1/2367798005604352/2368397109198848/STEM/03d97de4-6c57-4b61-8e5b-eb1a77de96a8.png)
(1)若P点在BC上运动,求四边形AEPF的面积(用x的代数式表示)并写出x的取值范围
(2)当点P在BC上运动时,△EPF能否为直角三角形,若能,请写出此时x的值;若不能,请说明理由.
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【推荐1】[阅读]
在平面直角坐标系中,以任意两点P(x1,y1),Q(x2,y2)为端点的线段的中点坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3347c068ce8cfa6d0409eb35e1b0e0.png)
[运用]
(1)如图,矩形ONEF的对角线相交于点M,ON,OF分别在x轴和y轴上,O为坐标原点,点E的坐标为(4,3),则点M的坐标为________;
(2)在平面直角坐标系中,有A(-1,2),B(3,1),C(l,4)三点,另有一点D与点A,B,C构成平行四边形的顶点,求点D的坐标.
在平面直角坐标系中,以任意两点P(x1,y1),Q(x2,y2)为端点的线段的中点坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3347c068ce8cfa6d0409eb35e1b0e0.png)
[运用]
(1)如图,矩形ONEF的对角线相交于点M,ON,OF分别在x轴和y轴上,O为坐标原点,点E的坐标为(4,3),则点M的坐标为________;
(2)在平面直角坐标系中,有A(-1,2),B(3,1),C(l,4)三点,另有一点D与点A,B,C构成平行四边形的顶点,求点D的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/87663b86-5905-4461-98ee-3f1fe17ecf37.png?resizew=278)
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【推荐2】如图,在
中,过点A作
交
的延长线于点E过点D作
,交
的延长线于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/81503633-2d36-415d-aee4-dcf54dff672f.png?resizew=180)
(1)求证:四边形
是矩形;
(2)连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c05986ad5fa244bc1aedf7b5d216544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b41fbe1fcf9e627166e026a1ae42cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/81503633-2d36-415d-aee4-dcf54dff672f.png?resizew=180)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db203a75be4335050febf55bc53d596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3fa8d548c714d007e393a84a050884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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