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蝴蝶定理證明2：綜合法
Author:
連琨銘
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
四邊形的特性
拼砌四邊形
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
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Area of Trapezium
task3
艾雪鑲嵌
C60足球模型（金丝彩球）
GeoGebra创建的小游戏集
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Right Triangles
Fractal Geometry
Terms
Differential Equation
Linear Regression