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三角形的四心 - 昱崧同學
Author:
Eric Chang-Chien
GeoGebra
New Resources
球體建築師
找出對稱軸
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
Discover Resources
平行四邊形面積
正五角錐(旋轉，實體、透視)
Light reflected in ellipse
加法001(结果10以内)
直线与平面垂直的折纸实验
Discover Topics
Reflection
Prism
Vectors 2D (Two-Dimensional)
Diagrams
Natural Numbers