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椭圆的定义
Author:
GeoGebra Institute of WuXi
GeoGebra
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兩組對邊相等和有直角的四邊形
四邊形的特性
異分母分數減法
三位數除以一位數（一）
球體建築師
Discover Resources
對稱
F.1 Ch10.5 Transformation of Points on the Coordinate Plane
Solving Triangles (Ambiguous SSA case)
兩位數乘兩位數直式
椭圆的定义
Discover Topics
Arithmetic
Difference and Slope
Tangent Line or Tangent
Matrices
Exponential Functions