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[教学] 方形中的爱心2
Author:
acchu
GeoGebra
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球体的截面
椭圆内切圆链
镂空正方体案例对比
龙形曲线-分形龙
小学资源收集
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justin0704
橢圓3--平行四邊形法
中国纸质灯笼
sintx
植树问题
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Linear Equations
Straight Lines
Tangent Line or Tangent
Calculus
Right Triangles