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Why same areas?
Author:
Terry Tam
Topic:
Area
GeoGebra
Given a parallelogram ABDC, E is a point on the line BD, and both lines AB and CE extend to meet at F. Prove that area of triangle ABE = area of triangle EDF. (Hint: Try to drag point E to point B as a diagonal BC)
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兩組對邊相等的四邊形
畫出對稱圖形
兩組對邊相等和有直角的四邊形
球体的体积推导
找出對稱軸
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