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圓內的光反射
Author:
王政凱
GeoGebra
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兩位數加法
三位數除以一位數（一）
四邊形的特性
算柱 (兩位數)
拼砌四邊形
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i love you
Number of solutions of two straight lines
禪繞畫
根據百分率找數量（一）:例1的副本
分點與向量比
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Circumcircle or Circumscribed Circle
Fractions
Definite Integral
Indefinite Integral
Geometric Mean