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Author:
Choi King Hong
GeoGebra
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兩組對邊相等的四邊形
兩位數除以一位數（一）
画直线等分三角形的面积
兩位數加法
球體建築師
Discover Resources
Lab 3 Task 1 : Rectangle Construction
How to draw a triangle with ruler and compasses?
三垂線定理
二年級_柱體的觀察
向量求和动画演示
Discover Topics
Logic
Planes
Difference and Slope
Definite Integral
Centroid or Barycenter