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地球－完整球面
Author:
黃俊翔
GeoGebra
New Resources
祖冲之的期望：内棋与外棋
兩位數加法
兩位數除以一位數（一）
垂直線的斜率
兩位數除以一位數（二）
Discover Resources
Polygon Activity
馬字歌
justin sin
简易立体几何的副本
Area of a cricle by n-polygon
Discover Topics
Equations
Trigonometric Functions
Coordinates
Cube
Trapezoid