A greedy triangle gets bored being a triangle and asks the local shape-shifter for just one more angle. Being a quadrilateral is fun for a while, but it becomes dissatisfied too. After requesting more and more angles, the once-triangle doesn?t know which side is up. This lively introduction to geometry contains pages for teachers that include extension activities. Developed by mathematics education expert and curriculum developer Marilyn Burns, Brainy Day Books encourage the teaching and learning of math through literature