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2007-07-28 2:39 am
回答 (2)
2007-07-28 2:45 am
✔ 最佳答案
四邊形的內角和=(4 - 2)×180°
=360°
∴z+115°+100°+90°= 360°(四邊形的內角和)
z + 305°=360°
z = 55°
2007-07-28 2:44 am
z = 360 - 115 - 100 - 90
z = 55
z = 55
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070727000051KK04276