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平行四邊形
Author:
Ching-Hui Chou
Topic:
Parallelogram
GeoGebra
New Resources
直線的斜率
球体的体积推导
三位數除以一位數（一）
漂亮的摇摆曲线
斜率的值
Discover Resources
有趣的反例
圓的面積
面外一點
congruent (ASA)
sin(x) 的函數圖形的副本
Discover Topics
Isosceles Triangles
Mode
Straight Lines
Random Experiments
Boxplot