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5．勾股定理的证明
Author:
GGB
GeoGebra
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球体的体积推导
探究三角形的全等條件
祖冲之的期望：内棋与外棋
斜率的值
画直线等分三角形的面积
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弧度
題4
Book
畢氏定理證明（Ｉ）
The motion of a charged particle in an electric field带电粒子在加速电场和偏转电场中的运动
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Sine
Indefinite Integral
Angles
Distributions
Sphere