This challenge can be used as a Pi Day activity on March 14th or can be used as a review of circles. Clues require knowledge of pi, understanding of circle vocabulary words, and use of the formulas for circumference of a circle, area of a circle, and volume of a cylinder. (A hint card is included if needed!)The introduction for the Escape Challenge is loosely based on characters from Sir Cumference and the Knights of the Round Table by Cynthia Neuschwander. Small groups of students compete agai