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1989全国理20
Author:
常振虎
GeoGebra
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圓的基本性質
探究三角形的全等條件
直線的斜率：水平變化 & 鉛垂變化
球体的体积推导
画直线等分三角形的面积
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定积分的概念
HKCEE 2011 Q17
Cactest
習作A三ch1_11
包含除法（1 ÷分數）的副本
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Function Graph
Rectangle
Equilateral Triangles
Intersection
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