Eight

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Eight

Five Times Three Is Fifteen

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Five Times Three Is Fifteen

Op Art On a Rhombic Enneacontahedron

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Op Art On a Rhombic Enneacontahedron

The rhombic enneacontahedron has 90 faces; 30 are narrow rhombi (hidden here), and 60 are wider rhombi (decorated with the op art piece from two posts ago).

Software credit: see the polyhedral software I used at http://www.software3d.com/stella.php — free trial download available.

Seven

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Seven

Three

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Three

73 Circles

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73 Circles

Ripples

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Ripples

An interference pattern / op art piece created with Geometer’s Sketchpad and MS-Paint.

Fifth Wheel

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Fifth Wheel

32 Circles

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56 Circles

Tricycle

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tricycle
(Click to enlarge)