Can you reproduce this drawing?
More from Chalkdust
Congruent Triangles
We review the seventh of this year’s nominees for the Book of the Year
On the cover: cellular automata
Discover the meaning of the coloured squares on the cover of issue 13
On curvature: cars, clothoids and cartography
Issah Merchant discusses the geometric principles behind, and real-world applications of, curvature
On the cover: Hydrogen orbitals
Find out more about the weird shapes on the cover of Issue 08
Review of Galois Knot Theory
A thrilling review of this truly enlightening book
Puzzles on square grids
How to make Sudoku more interesting