3. 两个正三角构成的菱形,one对角线和四边相同,另一条不同
4. abc 三角,d is inside abc. ad=bd=cd=bc, ab=ac
• 5. abc 正三角,d is outside abc. ad=ab=bc=ac, bd=cd -longsky- ♂ (0 bytes) () 04/08/2010 postreply 11:04:21
• This is the same as my 4 -oops_yz- ♀ (0 bytes) () 04/08/2010 postreply 11:06:15