满分5 >
初中数学试题 >
如图,在菱形ABCD中,DE⊥AB于E,DE=8,sinA=,则菱形ABCD的面...
如图,在菱形ABCD中,DE⊥AB于E,DE=8,sinA=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152013_ST/0.png)
,则菱形ABCD的面积是
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152013_ST/images1.png)
考点分析:
相关试题推荐
已知A(2,y
1),B(3,y
2)是反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152012_ST/0.png)
图象上的两点,则y
1 y
2.(填“>”或“<”)
查看答案
如图,正方形ABCD中,点E在边BC上,且CE=2BE.连接BD、DE、AE,且AE交BD于F,OG为△BDE的中位线.下列结论:①OG⊥CD;②AB=5OG;③
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152009_ST/0.png)
;④BF=OF;⑤
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152009_ST/1.png)
,其中正确结论的个数是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152009_ST/images2.png)
A.2
B.3
C.4
D.5
查看答案
如图,矩形纸片ABCD沿过点B的直线折叠,点A落在BC边上的点E处,还原后,再沿过点E的直线折叠,点A落在BC边上的点F处,则tan∠FAB=( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152008_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152008_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152008_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361715220/SYS201311011927373617152008_ST/2.png)
D.
查看答案