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全景平面投影
Author:
xiaoming wang
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
異分母分數減法
三位數除以一位數（二）
四邊形的特性
Discover Resources
test P1
題2
橢圓軌跡
負指數的計算
圆周率π的收敛极快算法（代数几何方法）
Discover Topics
Polygons
Differential Equation
Linear Functions
Sphere
Random Experiments