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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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Nested spiral octagon
小数 的副本
Fibonacci Clock
四邊形的特性
畫出對稱圖形
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小二、小三_時間(教師版)
莫比烏斯帶01
堆疊多邊形
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
弓形的滚动
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Kite
Rectangle
Indefinite Integral
Variance
Combinatorics