Eight

Image

Eight

Five Times Three Is Fifteen

Image

Five Times Three Is Fifteen

Fifteen Times Two Is Thirty

Image

Thirty

Five Times Six Is Thirty

Image

Five Times Six Is Thirty

Those big round things aren’t circles. They are regular thirty-sided polygons, or triacontagons.

Factors of Twelve

Image

The Prime Factorization of Twelve

Op Art On a Rhombic Enneacontahedron

Image

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

Image

Seven

Color Wheel Mandala

Image

Color Wheel Mandala

Pentagonal Mosaic

Image

Pentagonal Mosaic

Five and Dime III

Image

Five and Dime III