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Author:
Lin Ching Chieh
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
四邊形的特性
錐體建築師
直角坐標平面上的旋轉變換
Discover Resources
Trigonometric Ratios: Cosine & Tangent 三角比：餘弦和正切
題2
Copy of 固定周界的長方形的面積變化
Lesson02 absolute value function
切线
Discover Topics
Dilation
Rhombus
Equilateral Triangles
Secant Line or Secant
Pythagoras or Pythagorean Theorem