Pararell angle
2011-12-30 1:38 am
圖片參考：https://sites.google.com/site/emathqss/qs/2.jpg
Could you please solve this question with steps? Thanks.
回答 (1)
2011-12-30 2:02 am
✔ 最佳答案
Let E be a point on the left of x such that EX // AB // CD , thenㄥBAX + ㄥXCD
= ㄥAXE + ㄥEXC
= 100°
So
ㄥXAY + ㄥXCY
= (1/2)ㄥAXE + (1/2)ㄥEXC
= 50°
and
ㄥAXC(Big) = 360 - 100 = 260°
then
ㄥXAY + ㄥXCY + ㄥAXC(Big) + ㄥAYC = 360°
50° + 260° + ㄥAYC = 360°
ㄥAYC = 50°
收錄日期: 2021-04-21 22:22:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111229000051KK00732