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20190530 與平行線有關的角
Author:
Hui Sir
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
異分母分數減法
柱體建築師
兩位數加法
Discover Resources
Task 6: Circumcirle of a Triangle
各種五邊形
長方形的對稱軸
我的第一个绘本
直角坐標平面上的旋轉變換 (1)
Discover Topics
Sine
Combinatorics
Congruence
Line Segment
Stochastic Process or Random Process