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anlge at centre twice angle at circumference
Author:
lamyc
GeoGebra
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兩組對邊相等的四邊形
四邊形的特性
【案例】2018年全国1卷理科12题
算柱 (兩位數)
球体的体积推导（优化版）
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用 Geogebra 模擬日照、影長變換
Locus (Segment)
整數乘分數
乘加挑戰題
基础知识
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Cuboid
Geometric Transformations
Differential Equation
Reflection
Conic Sections