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圖形的周界
Author:
spkwan
GeoGebra
New Resources
兩組對邊相等的四邊形
画直线等分三角形的面积
直角坐標平面上的旋轉變換
四邊形的特性
錐體建築師
Discover Resources
N邊形滾動
拋物線與直線關係
二次函數圖形
玖数小学数学（思维拓展）
勾股定理：射影无字证明
Discover Topics
Binomial Distribution
Means
Diagrams
Linear Programming or Linear Optimization
Upper and Lower Sum or Riemann Sum