http://www.upload.worldzh.net/files/1271687168.JPG
更新1:
can u briefly explain which one is perpendicular to which one? thx!
F.3 maths1題 20m*** urgent!!!
2010-04-20 6:26 am
help help me pls i don't understand!
http://www.upload.worldzh.net/files/1271687168.JPG
http://www.upload.worldzh.net/files/1271687168.JPG
回答 (1)
2010-04-20 6:45 am
✔ 最佳答案
a) ㄥAQCb) ㄥPVR
c) ㄥBVE
2010-04-19 23:00:05 補充：
a) 4個側面△全等,ㄥCQB = ㄥAQB = 90°
b) 4個側面△等腰 , P是AB中點 , 即VP丄AB , 同理 , VR丄CD
c)ㄥVEB是直角
收錄日期: 2021-04-21 22:13:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100419000051KK01716