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光的反射
Author:
JUNWAYLIANG
A,B兩點在直線L同側, 在L上找一點P使得由A點出發的光線, 會經由L上反射至B點(等價命題為:在直線L上找一點P, 使得AP+PB有最小值)
GeoGebra
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平行線的判定
活动三:应用性质
球体的截面
比較五件物件的重量
异形操场
Discover Resources
gjc097a29 重心
Directed numbers
單一物件連續動畫
光的折射
学习 GeoGebra 课堂
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Difference and Slope
Normal Distribution
Percentages
Surface
Addition