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正三角形內一點P, 到三頂點距3,4,5
Author:
Ho-Kai Chen
GeoGebra
New Resources
球体的体积推导（优化版）
四邊形的特性
兩位數加法
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
有人要告白嗎?
Different Forms of Quadratic Functions 二次函數的不同形式
九點圓
根號n的做圖法之二
電子幾何條
Discover Topics
Vectors 3D (Three-Dimensional)
Arithmetic Operations
Matrices
Symmetry
Set Theory