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Cavalieri's Principle
Author:
李玲玲
GeoGebra
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平行線的判定
圓的基本性質
直線的斜率：水平變化 & 鉛垂變化
折扣
比較五件物件的重量
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空間中平面
How to draw a triangle with ruler and compasses?
面積
戴德林球
圓周公式應用題2的副本
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Rectangle
Coordinates
Surface
Integers
Diagrams