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The dual of the uniform great rhombicuboctahedron and Wenninger dual W_(85).

The dual of the great dirhombicosidodecahedron U_(75) and Wenninger dual W_(119).

The dual of the great dodecicosahedron and Wenninger dual W_(101).

The dual of the great cubicuboctahedron and Wenninger dual W_(77).

The dual of the great snub dodecicosidodecahedron and Wenninger dual W_(115).

The dual of the great retrosnub icosidodecahedron and Wenninger dual W_(117).

The dual of the great rhombihexahedron U_(21) and Wenninger dual W_(103).

The 30-faced dual of the truncated dodecadodecahedron and Wenninger dual W_(98).

The pedal curve of a unit circle with parametric equation x = cost (1) y = sint (2) with pedal point (x,y) is x_p = cost-ycostsint+xsin^2t (3) y_p = ...

The pedal curve of an ellipse with parametric equations x = acost (1) y = bsint (2) and pedal point (x_0,y_0) is given by f = ...