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Cardiod: r=1-cos(θ-π/2)
Author:
jwshen
GeoGebra
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镂空正方体案例对比
异形操场
盈利與虧蝕
球体的截面
第八周作业2
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Book4
http://www.qsir.org/?p=8853
正三角形內一點到三頂點的距離
乘法
拋物線2-焦點法
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Differential Calculus
Multiplication
Cube
Constructions
Straight Lines