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平移旋轉對稱
Author:
chen mingchuan
GeoGebra
New Resources
画直线等分三角形的面积
兩位數加法
柱體建築師
異分母分數減法
算柱 (兩位數)
Discover Resources
proof SSS
JAY三角
相同圖形的拼砌（梯形）
椭圆的定义
我的第一个绘本
Discover Topics
Similar Triangles
Exponential Functions
Kite
Definite Integral
Percentages