圖片參考:http://img25.imageshack.us/img25/5189/mathsi.png
In the figure, AGHC, AFJD, BGFE, BHID and CIJE are straight lines.
(a) Prove that a+c =∠FJE
(b) Prove that a+b+c+d+e = 180°
10點,,thx!!
更新1:
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更新2:
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更新3:
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更新4:
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更新5:
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