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GeoGebra
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椭圆内切圆链
第八周作业2
斐波那契螺旋弧线(表格法-可动态调节)
第八周作业3
第三周作业效果演示
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Angle at Centre Twice Angle at Circumference
弦中點
Net of cone
网板第60期第2题
两角和的正弦公式几何证明(改进)
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Sine
Volume
LCM and GCD
Tangent Function
Vectors 2D (Two-Dimensional)