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三角函數的性質
Author:
yuchengda
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（一）
画直线等分三角形的面积
拼砌四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
座標上的定點軌跡圖
利用对称求线段和最值（移动端）
point uion coloring
GeoGebra培训手册素材
Locus (Two points 1)
Discover Topics
Triangles
Probability
Vectors 2D (Two-Dimensional)
Sine
Linear Programming or Linear Optimization