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平行四邊形
Author:
涂老師
Topic:
Parallelogram
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
球体的体积推导（优化版）
四邊形的特性
兩位數除以一位數（二）
Discover Resources
繪製平行四邊形
Question 1
cube
圖二 的複本
三个平面两两相交
Discover Topics
Triangles
Trigonometry
Tree Diagrams
Mathematics
Addition