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拋物線與光線反射
Author:
紀老師
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
Earth with coastline
找出對稱軸
四邊形的特性
Discover Resources
clock
整數的加法
B小學今星期的遲到人數
均分除法（整數÷整數）
算柱 (兩位數)
Discover Topics
Quadrilaterals
Variance
Definite Integral
Secant Line or Secant
Solids or 3D Shapes