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固定周界長方形的面積變化（二）
Author:
Anthony OR 柯志明
,
GeoGebra Institute of Hong Kong
Topic:
Area
GeoGebra
New Resources
【案例】2013年安徽高考15题
找出對稱軸
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
Discover Resources
直线倾斜角与斜率
Ex. 10C Q.8b
平行四邊形的面積
Locus (Two points 2)
質數
Discover Topics
Trigonometric Functions
Derivative
Vectors 2D (Two-Dimensional)
Arithmetic Mean
Cosine