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單位圓上的三角函數
Author:
polina
GeoGebra
New Resources
判斷球體
算柱 (兩位數)
異分母分數減法
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
parallelogram and squares
圆的面积展开的副本
相似双子模型（任意三角形）
圓形重疊問題
三角函数变换
Discover Topics
Plane Figures or Shapes
Statistics
Fractal Geometry
Trapezoid
Pyramid