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平行四邊形性質
Author:
Gideon Huang
GeoGebra
New Resources
兩位數除以一位數（二）
球体的体积推导（优化版）
垂直線的斜率
漂亮的摇摆曲线
三位數除以一位數（二）
Discover Resources
二次函數
梯形
繪製平行四邊形
Angles in intersecting and parallel lines
蜗牛壳模型
Discover Topics
Exponent
Isosceles Triangles
Diagrams
Limits
Planes