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星八面體
Author:
pingfeng.wu
GeoGebra
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拼砌四邊形
四邊形的特性
兩組對邊相等的四邊形
球体的体积推导(优化版)
畫出對稱圖形
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Clock
自製座標軸箭頭與標籤
equations of circle 2
b站
黄金螺线与向日葵-朱老师
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Division
Trigonometry
Isosceles Triangles
Polynomial Functions
Orthocenter