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Author:
陳允杰
GeoGebra
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GeoGebra笔记功能体验课件
三位數除以一位數（一）
四邊形的特性
【案例】2018年全国1卷理科12题
第八周作业
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同學最喜愛的運動
How to reconstruct a quadrilateral farm to a triangular one with the same area?
向量分點公式
Illusion-平行线错觉
勾股定理证明2
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Random Variables
Perimeter
Symmetry
Triangles
Subtraction