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圆的面积展开 的副本
Author:
杨欣霞
GeoGebra
New Resources
畫出對稱圖形
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
錐體建築師
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三心：與三角形形狀的關係
數位學習社
Q2-3
o'clcok
四邉形 (四年級) 教師版
Discover Topics
Combinatorics
Functions
Straight Lines
Angles
Logic