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錯角---不平行綫
Author:
chanfushun
GeoGebra
New Resources
四邊形的特性
兩組對邊相等的四邊形
三位數除以一位數（二）
異分母分數減法
直角坐標平面上的旋轉變換
Discover Resources
Quiz on Rectangular Coordinates (1) 直角坐標測驗1
比例
封閉區域著色
銳角、直角和鈍角
三角函數的繪圖2
Discover Topics
Integral Calculus
Sequences and Series
Geometric Mean
Parallelogram
Equations