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Wheel on curve
Author:
陳隆期
GeoGebra
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繪畫正方形
半圆的滚动
勒洛四面体（参数曲面法）
長方形的周界與長和闊的關係 (學生版)
繪畫長方形
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阿波羅尼斯相關問題：與兩相切圓外切和一圓內切
拋物線
A CHAOS GAME!
爱奇艺
動態軌跡與動態色彩
Discover Topics
Trapezoid
Sphere
Linear Functions
Equations
Cosine