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Projection
Author:
Jia-ming Shiu
Projection
GeoGebra
New Resources
異分母分數減法
四邊形的特性
兩位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
Discover Resources
立體圖
平面向量
直线倾斜角与斜率
pentagon
海宇的第一个GGB绘本
Discover Topics
Set Theory
Functions
Ellipse
Parabola
Equilateral Triangles