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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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四邊形的特性
找出對稱軸
兩位數除以一位數（一）
兩組對邊相等的四邊形
画直线等分三角形的面积
Discover Resources
peacock2
橫向橢圓
Equality of Ratios
Angle between Lateral Faces 1
空間向量
Discover Topics
Isosceles Triangles
Random Experiments
Reflection
Curve Sketching
LCM and GCD