如图,在
ABC中,
ACB=90°,D是AC的中点,DE
AC,AE//BD.
(1)证明:
ADE![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4f0763c0973e539a73198990d4bfc4.png)
DCB;
(2)连接BE,判断四边形BCDE的形状,并证明;
(3)若BC=4,AE=5,求四边形ACBE的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4f0763c0973e539a73198990d4bfc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
(2)连接BE,判断四边形BCDE的形状,并证明;
(3)若BC=4,AE=5,求四边形ACBE的周长.
![](https://img.xkw.com/dksih/QBM/2019/4/25/2190172905537536/2193766684540928/STEM/f2a7cff3bd3246f6a9cf1c81bb1bc853.png?resizew=134)
更新时间:2019-04-30 20:52:39
|
【知识点】 根据矩形的性质与判定求线段长
相似题推荐
解答题-应用题
|
适中
(0.65)
【推荐1】如图1是一款订书机,其平面示意图如图2所示,其主体部分矩形
由支撑杆
垂直固定于底座
上,其中
,
,压杆
,
,使用过程中矩形
可以绕点E旋转.
,求压杆端点
到底座
的距离;
(2)使用过程中,当点
落在底座
上时,如图3,测得
,求压杆端点
到底座
的高度.
(参考数据:
,
,结果精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40eee6f84b2af5e06da1cd3d0a1f3a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbff9efd1555abbb923f9dc8257fca10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49588128834dc5bccdb772d5062f0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc5bbd98c2104958dd8ff665e657a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6010d78c8fd2fc4f5f2200cbb1adb5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)使用过程中,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2c047ace1296b65171167557239922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1b68822169ec4cfb0e76a0a4ab2dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db936261aa0625846ad56e78c3647d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1ab33123e8682411fd72e004f70ed7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,点
为
的中点,过点
作
,延长
到点
使
,连接
,
.
(1)求证:四边形
是矩形;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](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/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/7c3b4287-1cdc-4ec2-aa68-7d7f6b1f0d15.jpg?resizew=226)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dbf31dfd36aa456a63bafea8bc1985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
您最近一年使用:0次