如图,点E,F,G,H分别为四边形ABCD的边AB,BC,CD,DA的中点,试判断四边形EFGH的形状,并证明你的结论.
考点分析:
相关试题推荐
近年来,我市开展以“四通五改六进村”为载体,以生态文明为主要特色的新农村建设活动取得了明显成效.下面是市委领导和市民的一段对话,请你根据对话内容,替市领导回答市民提出的问题.(结果精确到0.1%).
查看答案
如图,请你画出方格纸中的图形关于点O的中心对称图形,并写出整个图形的对称轴的条数.
查看答案
计算:|-3|+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430015_ST/0.png)
+(1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430015_ST/1.png)
)
-tan45°.
查看答案
观察下列顺序排列的等式:a
1=1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/0.png)
,a
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/1.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/2.png)
,a
3=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/3.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/4.png)
,a
4=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/5.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/6.png)
,….试猜想第n个等式(n为正整数):a
n=
.
查看答案