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椭圆的参数方程
Author:
梁航宇
GeoGebra
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折扣
圓的切線方程
斜率的值
直線的斜率：水平變化 & 鉛垂變化
龙形曲线-分形龙
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Parameter
ETV 對稱
彩色立体方阵、点阵
Copy of 和差角公式几何证明
圆锥的侧面展开图3D动画的副本
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Differential Calculus
Rhombus
Prism
Translation
Statistical Characteristics