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Proof77 - 楊筑雯
Author:
郭亮偉
GeoGebra
New Resources
四邉形 (四年級) 教師版
【案例】2013年安徽高考15题
三位數除以一位數（二）
異分母分數減法
判斷球體
Discover Resources
waaachen
World's Hardest Easy Geometry Problem.
複合圖形(四)
Triangles with the same height
正弦函數的遞增與遞減
Discover Topics
Arithmetic Operations
Rotation
Rhombus
Differential Equation
Parabola