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Drag the red dots, see the area ratio of EHFG to ABCD
Author:
johnmayhk
GeoGebra
New Resources
画直线等分三角形的面积
四邉形 (四年級) 教師版
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（二）
Discover Resources
click and Jump to up
畢氏定理動態證明(劉徽)
斯坦納-雷米歐司(Steiner-Lehmus)定理證明一
立方体截面
congruent activity
Discover Topics
Integers
Similar Triangles
Definite Integral
Rational Numbers
Piecewise Functions