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鏡面反射光線
Author:
紀老師
鏡面反射光線的動畫 入射角=反射角
GeoGebra
New Resources
兩位數加法
異分母分數減法
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
waaachen
題八
Prism and Cylinder 4
Copy of Mjerenje obujma 5
纏繞畫2
Discover Topics
Cuboid
Orthocenter
Cylinder
Linear Equations
Geometric Mean