A doodle with its vertices slightly “exploded”: the doodle is simply a distorted circle.
More from Chalkdust
What’s hot and what’s not, Issue 18
Fashion is fleeting, Chalkdust regulars are not.
Significant figures: Gladys West
Madeleine Hall looks at one of the minds behind GPS
How do calculators do trigonometry?
W.L. Feldhusen explains the obscure sine-finding trick hiding inside your calculator!
Christmas competition #3: ‘An eggnog mystery’
Lies, liquor and logical deduction play their part in this festive holiday tale
Prime jewellery
Make your own treasures, guaranteed to be priceless on a future episode of Antiques Roadshow
Can you solve these puzzles?
While we work on issue 2