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用心包裝的禮物
Author:
李春培
用心包裝的禮物
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球體建築師
球体的体积推导（优化版）
兩組對邊相等的四邊形
第八周作业
Discover Resources
Angle Sum of Pentagon (SWC)
task2
折射的現象
area 面積
sin(x) 的函數圖形的副本
Discover Topics
Equations
Constructions
Linear Programming or Linear Optimization
Perimeter
Trapezoid