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sharon扭曲的正方形
Author:
杨秀芬
GeoGebra
New Resources
兩位數加法
判斷球體
小数 的副本
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
Discover Resources
平行線的性質
階梯函數
認識函數
菱形有甚麼特性？
sine graph (reduce to 1/2 and then translate leftward by 15 degree)
Discover Topics
Piecewise Functions
Difference and Slope
Triangles
Matrices
Angles