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三角形重心
Author:
Cao Yiming
移动三角形的三个顶点，A，B，C
GeoGebra
New Resources
畫出對稱圖形
直角坐標平面上的旋轉變換
異分母分數減法
兩位數加法
球體建築師
Discover Resources
test
Apollonius Problem kissing coin problem
中一︰相似圖形（平移、旋轉、反射、放大縮小）
建中科學班檢定
学用数学（分季）
Discover Topics
Complex Numbers
Cuboid
Linear Equations
Random Variables
Parabola