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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)
New Resources
四邉形 (四年級) 教師版
球体的体积推导
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
異分母分數減法
Discover Resources
正十二面體
三角函數的性質
餘弦定理的圖形證明
動畫
Question 2
Discover Topics
Terms
Parallelogram
Centroid or Barycenter
Triangles
Rectangle