Inspired by the drawings of Artist M.C Escher, this activity is a step-by-step guide to drawing an impossible triangle illusion. This could be used in an art or maths context to provide a fun lesson break. I use it as part of an illusion printmaking unit with my students, after talking to them about the work of M.C Escher, and the connection between art and maths. Complementary Resources: M.C.Escher Artist Presentation This presentation includes links to videos discussing the work of M.C Escher