以点A为顶点作两个等腰直角三角形(
,
),
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/ed141fb5-9c5b-424b-af95-20cf1b0b5c0e.jpg?resizew=503)
(1)如图1所示放置,使得一直角边重合,延长
,交
于点F,试说明
.
(2)如图2所示放置,连接
与
相交于点F,
①
与
的大小有什么关系,请说明理由.
②
与
的位置有什么关系,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/ed141fb5-9c5b-424b-af95-20cf1b0b5c0e.jpg?resizew=503)
(1)如图1所示放置,使得一直角边重合,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
(2)如图2所示放置,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2023-02-03 16:59:57
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,在
中,
,
,点
,
分别在边
,
上,
,连接
,
,点
,
,
分别为
,
,
的中点.
与
的数量关系是________,位置关系是________;
(2)把
绕点
顺时针方向旋转到图2的位置,连接
,
,
,判断
的形状,并说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
(2)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在
ABCD中,E是对角线BD上的一点,过点C作CF∥DB,且CF=DE,连接AE,BF,EF
(1)求证:△ADE≌△BCF;
(2)若∠ABE+∠BFC=180°,则四边形ABFE是什么特殊四边形?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/e5ef2903-e354-4925-9ff8-04171f4782ac.png?resizew=158)
(1)求证:△ADE≌△BCF;
(2)若∠ABE+∠BFC=180°,则四边形ABFE是什么特殊四边形?说明理由.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在△ABC中,AB=AC=10cm,BD⊥AC于D,且BD=8cm.点M从点A出发,沿AC方向匀速运动,速度为2cm/s;同时直线PQ由点B出发沿BA方向匀速运动,速度为1cm/s,运动过程中始终保持PQ∥AC,直线PQ交AB于P,交BC于Q,连接PM,设运动时间为t(s)(0<t<5).
![](https://img.xkw.com/dksih/QBM/2014/6/13/1573733664571392/1573733670756352/STEM/aa930b13ccad44a78bfa9bfa00e6cea0.png)
(1)当四边形PQCM是平行四边形时,求t的值;
(2)当t为何值时,△PQM是等腰三角形?
(3)以PM为直径作⊙E,在点P、Q整个运动过程中,是否存在这样的时刻t,使得⊙E与BC相切?若存在,请求出运动时间t的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/6/13/1573733664571392/1573733670756352/STEM/aa930b13ccad44a78bfa9bfa00e6cea0.png)
(1)当四边形PQCM是平行四边形时,求t的值;
(2)当t为何值时,△PQM是等腰三角形?
(3)以PM为直径作⊙E,在点P、Q整个运动过程中,是否存在这样的时刻t,使得⊙E与BC相切?若存在,请求出运动时间t的值;若不存在,请说明理由.
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】已知
的两边AB,AC的长是关于x的一元二次方程
的两个根,第三边BC的长是10.
(1)求证:无论n取何值,此方程总有两个不相等的实数根.
(2)当n为何值时,
为等腰三角形?并求
的周长.
(3)当n为何值时,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113b3be2e70e6adc18e1f33eee5b682b.png)
(1)求证:无论n取何值,此方程总有两个不相等的实数根.
(2)当n为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)当n为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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