parallelogram area question

2012-12-29 6:10 am

please click this link:http://upload.lsforum.net/users/public/q3499parallelgramo207.png

It is a parallelogram and I want to ask Why two shaded triangles' area are the SAME at the situation that no other clues are given.

回答 (2)

2013-01-07 10:30 pm

✔ 最佳答案

Their area
= (1/2) parallelogram area - the base white triangle area
圖片參考：http://upload.lsforum.net/users/public/q3499parallelgramo207.png

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2013-01-13 3:56 am

Their area
= (1/2) trapezium area - the base white triangle area

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