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2S2 3S3 角的認識 20180312 fixed
Author:
makkei
GeoGebra
New Resources
画直线等分三角形的面积
四邉形 (四年級) 教師版
找出對稱軸
畫出對稱圖形
三位數除以一位數（二）
Discover Resources
同心圓和線段-3(線段到最外圓有小圓)
三角
二階行列式-平行四邊形的面積
Hamid Naderi Yeganeh segment3
F4_Ch9.1 任意角的三角比
Discover Topics
Trigonometric Functions
Trigonometry
Normal Distribution
Cylinder
Binomial Distribution