已知正方形ABCD的边长为1,一个以点A为顶点的45°角绕点A旋转,角的两边分别与边BC、DC的延长线交于点E、F,连接EF.设CE=a,CF=b.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/7d290e4f-b750-48aa-aeed-fe59d6295875.png?resizew=553)
(1)如图1,当∠EAF被对角线AC平分时,
①求∠AEC的度数;
②求a、b的值;
(2)当△AEF是直角三角形时,求a、b的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/7d290e4f-b750-48aa-aeed-fe59d6295875.png?resizew=553)
(1)如图1,当∠EAF被对角线AC平分时,
①求∠AEC的度数;
②求a、b的值;
(2)当△AEF是直角三角形时,求a、b的值.
更新时间:2022-08-13 06:50:57
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
,点C、D分别在射线
、
上,
是
的平分线,
的反向延长线与
的平分线交于点F.
(1)在图1中,当
时,求
的度数;
(2)如图2,当C、D两点分别在射线
、
上移动时(不与点O重合),其他条件不变,F的大小是否变化?若变化,请说明理由;若不变化,试求出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcabb6fa6da15ec93209d21671b7055a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/bb62e9ce-8e7d-4153-ab26-5763982c5981.png?resizew=234)
(1)在图1中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02ddf15f7d6189f2ec3baef55695ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
(2)如图2,当C、D两点分别在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】一个零件如图所示
(1)请说明∠BDC >∠A
(2)按规定∠A等于90°,∠B和∠C应分别等于32°和21°,检验工人量得∠BDC等于148°,就断定这个零件不合格,这是为什么?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/e98d8b26-fa48-481a-87ff-ffc1cf48514b.png?resizew=110)
(1)请说明∠BDC >∠A
(2)按规定∠A等于90°,∠B和∠C应分别等于32°和21°,检验工人量得∠BDC等于148°,就断定这个零件不合格,这是为什么?
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图所示,在平面直角坐标系
中,点
是y轴正半轴上一点,点B是反比例函数
图像上的一个动点,连接
,以
为一边作正方形
,使点D在第一象限.设点B的横坐标为m(
).
,求点B和点D的坐标;
(2)若
,点D落在反比例函数图像上,求m的值;
(3)若点D落在反比例函数图像上,设点D的横坐标为n(
),试判断
是否为定值?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4a4f5f3560ce9c1f01143a30e1bf0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157af4950c6ed48486e440a88eb76bbc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
(3)若点D落在反比例函数图像上,设点D的横坐标为n(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在Rt△ABC中,∠BAC=90°,D是BC的中点,E是AD的中点.过点A作AF∥BC交于BE的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2018/10/17/2055428307279872/2061401074917376/STEM/ebf6a5af86144a79809a44d65dce4418.png?resizew=244)
(1)求证:△AEF≌△DEB;
(2)若AC=4,AB=5,求菱形ADCF的面积.
![](https://img.xkw.com/dksih/QBM/2018/10/17/2055428307279872/2061401074917376/STEM/ebf6a5af86144a79809a44d65dce4418.png?resizew=244)
(1)求证:△AEF≌△DEB;
(2)若AC=4,AB=5,求菱形ADCF的面积.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,点A,B,C在O上,
是
的直径,
平分
,与
相交于点D.连接
,与
相交于点E.
的度数.
(2)如图2,过点A作
的切线,与
的延长线相交于点F,过点D作
,与
相交于点G.若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc30901a255fc967e88734abfee8147.png)
(2)如图2,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16bb0af923f804279dd21bd9589e580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6b8bd75d825a2b70b31fbba49e35ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.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Rt△ABC中,∠B=90°,AB=6,CD平分∠ACB交AB于点D,点O在AC上,以CO为半径的圆经过点D,AE切⊙O于E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/1ac3cc1a-8987-491d-92ca-7e516d0c33ea.png?resizew=159)
(1)求证:AD=AE.
(2)填空:
①当∠ACB=_______时,四边形ADOE是正方形;
②当BC=__________时,四边形ADCE是菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/1ac3cc1a-8987-491d-92ca-7e516d0c33ea.png?resizew=159)
(1)求证:AD=AE.
(2)填空:
①当∠ACB=_______时,四边形ADOE是正方形;
②当BC=__________时,四边形ADCE是菱形.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,四边形ABCD为正方形,点E为线段AC上一点,连接DE,过点E作
,交BC于点F,以DE,EF为邻边作矩形DEFG,连接CG.
(2)若
,求CG的长;
(3)当
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f0805cc7a96c866df10b667ac4851e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6143800e0e3849f4ff5af02cd86252bc.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9608cad892644b4094ed6438b69572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7652fd5598a9eaa011726784cae56bc8.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,在正方形
的外侧,以
为边作等边
,线段
与线段
相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/77ed1b38-b5a9-4d19-9795-316c9f8208ce.png?resizew=186)
(1)求
,
的度数;
(2)求证:
;
(3)求
的值.
![](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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/77ed1b38-b5a9-4d19-9795-316c9f8208ce.png?resizew=186)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a09981c03e8e6c00b7a65c56d95050.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c593ba4e7d7e89e66a926591022adcb1.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐3】如图,
是等边三角形,
边在直线l上,动点O在直线l上(O不与点B重合).
操作探究1:在图中作出
关于点O的中心对称图形
,连接
,
,则四边形
的形状是__________.
与
关于O成中心对称,当
在C的右侧且
时,判断四边形
的形状,并说明理由.
是任意三角形,且点A在直线l的上方,动点O在直线l上(O不与点B重合),在下图中已作出
关于点O的中心对称图形.
的一个参考图形,连接
,当
与
满足什么关系时,四边形
是正方形,直接写出答案.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
操作探究1:在图中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ef28bae91603373014bff6154c6fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cca6e2e2a7cda3b29935d253cd8328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ef28bae91603373014bff6154c6fc2.png)
![](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/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8610cbd611efef94c0e1f0327b7f266e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178d4802cd506f2db2927552b2127893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ef28bae91603373014bff6154c6fc2.png)
您最近一年使用:0次