Tin contains templates, gears and pens, W210mm x H80mm
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 to use. 11 piece set in a tin with
instructions.