15 Great Circles
by msraynsford, published
A mathematical model showing the intersection of 15 great circles in response to the challenge set in the Math Monday article, http://blog.makezine.com/2012/07/23/math-monday-those-circles-are-great/
This and all my other items can be found on my blog http://msraynsford.blogspot.co.uk/2012/07/15-great-circles.html
The model requires 60 semi circle shapes, which is 10 sheets of A4 card to assemble correctly.