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20190530 與平行線有關的角
Author:
Hui Sir
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
四邊形的特性
四邉形 (四年級) 教師版
拼砌四邊形
Discover Resources
Pythagorean Theorem Proof with Shearing
homework
三視圖
正方体展开图的副本
GeoGebra创建的小游戏集
Discover Topics
Variance
Straight Lines
Similar Triangles
Angles
Isosceles Triangles