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光源距離 Light Source Distance
Author:
W.L. Wong, Albert
GeoGebra
New Resources
異分母分數減法
拼砌四邊形
第八周作业
兩組對邊相等的四邊形
球体的体积推导（优化版）
Discover Resources
Projection of vector in R2
中線定理(阿波羅尼奧斯)定理
slide
利用Geogebra說明平行x軸與平行y軸之直線方程式性質
S7G1 模拟光的折射
Discover Topics
Kite
Equations
Exponential Functions
Right Triangles
Division