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1.4.8利用空间向量判断平面与平面垂直
Author:
李三军
GeoGebra
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祖冲之的期望：内棋与外棋
三角函数 的副本
斜率的值
圓的基本性質
漂亮的摇摆曲线
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線段上分點軌跡(橢圓)
與三半圓相切的圓
三角形
双曲椭圆
硬幣換算小遊戲
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Conditional Probability
Differential Equation
Volume
Quadratic Equations
Interest Calculation