As follows:
圖片參考：http://e.imagehost.org/0357/ScreenHunter_04_Mar_19_17_37.gif
maths~~~~~~
2010-03-20 2:06 am
回答 (1)
2010-03-20 2:12 am
✔ 最佳答案
ㄥBPA = 25° (alt.ㄥBP//AO)ㄥCOA = 2 ㄥBPA = 50°(圓心角2倍於圓周角)
ㄥABC = ㄥCOA = 50°(平行四邊形對角相等)
收錄日期: 2021-04-21 22:14:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100319000051KK00968