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翰林數學_2下_CH3-1_三角形的外角定理
Author:
翰林數學
GeoGebra
New Resources
兩位數除以一位數（二）
画直线等分三角形的面积
兩組對邊相等的四邊形
找出對稱軸
直角坐標平面上的旋轉變換
Discover Resources
圓周角與弦切角
基本三角函數
Quiz on Conditions for Congruence of Triangles 全等三角形的判定條件：測驗
Lens
高长乐
Discover Topics
Trapezoid
Vectors 2D (Two-Dimensional)
Means
Quadrilaterals
Upper and Lower Sum or Riemann Sum