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長方形和正方形的面積_題A至E
Author:
GeoGebra Institute of Hong Kong
Topic:
Area
,
Rectangle
,
Square
GeoGebra
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四邊形的特性
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
錐體建築師
找出對稱軸
Discover Resources
三下_三角形(學生版)
軌跡觀察---圓及正三角形上線段中點
探究余弦定理
乘加挑戰題
圆周长演示
Discover Topics
Percentages
Circle
Cuboid
Quadratic Functions
Inequalities