Originally posted by oscar at 2004-6-2 10:24 PM: 第一個: equal angle corresponds to equal side (不太清楚...自己拼出來的...) 第二個: the property of isoceles triangle 第三個: the property of equilateral triangle 第四個: base angle(s) of iso ... base angles~!(it must have the "s",my teacher said,so u can delete the branket) |