Search

They're back! Hypotrochoid is the mathematical term for a line traced by a fixed point in a circle -- your pen -- which is rotated around the inside of a larger...See more » They're back! Hypotrochoid is the mathematical term for a line traced by a fixed point in a circle -- your pen -- which is rotated around the inside of a larger circle. These beautiful flowing curves have fascinated mathematicians for centuries. Different points within the small circle produce wildly different patterns. A classic and absorbing drawing set, easy and fun. The set contains: 2 hypotrochoid templates, each with three gears, red, green and blue pens and an instructions booklet. Comes packaged in a tin box that measures 8 3/8”L x 3 ¼”W.See less »