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1987全国文5
Author:
常振虎
GeoGebra
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兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
判斷球體
兩位數加法
球體建築師
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平行四邊形面積
Homework1
Locus (Non parallel lines) _a
三角形面積(由面積求高)
抛物线定义
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Rectangle
Parametric Curves
Diagrams
Volume
Probability