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三角形內心_不完美版
Author:
lihsing.zen
Topic:
Centroid or Barycenter
GeoGebra
New Resources
直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
三位數除以一位數（二）
画直线等分三角形的面积
Discover Resources
平移旋轉對稱
指數與對數
zentangle
周界-平移法(教學練習一)
Slope of a tangent 切線斜率
Discover Topics
Exponential Functions
Scalene Triangles
Logarithmic Functions
Prism
Isosceles Triangles