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Author:
清綺楊
GeoGebra
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三位數除以一位數（一）
兩位數除以一位數（一）
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
球體建築師
Discover Resources
固定面積的圖形的周界變化
學習單：平行四邊形面積
How to draw a triangle with ruler and compasses?
太陽系的奧秘
热带风暴storm
Discover Topics
Rotation
Straight Lines
Vectors
Tree Diagrams
Trapezoid