![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
如图,菱形ABCD周长为20,对角线AC、BD相交于点O,E是CD的中点,则OE的长是()
A.2.5
B.3
C.4
D.5
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、2.5
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.2.5
B.3
C.4
D.5
A、2.5
A.16
B.6.25
C.9
D.25
A.28°,120°
B.120°,28°
C.32°,120°
D.120°,32°
若菱形两条对角线的长分别为6和8,则这个菱形的周长和面积分别为().
A.14;24
B.14;48
C.20;12
D.20;24
E.20;48
A.对角线AC平分对角线bd且AC垂直BD
B.对角线AC平分对角线bd且角a等于角C
C.对角线AC平分对角线bd且平分角a和角c
D.对角线AC平分角A和角c,且角a等于角c