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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
New Resources
第八周作业
兩位數除以一位數（一）
兩組對邊相等的四邊形
三位數除以一位數（二）
畫出對稱圖形
Discover Resources
方格紙上畫長方形1
指數與對數的對稱性
正立方體中的正四面體
Probability animation
二次函數不等式及其圖像(進階版)
Discover Topics
Parallelogram
Conic Sections
Volume
Differential Calculus
Geometric Distribution