Sir Cumference and the Dragon of Pi

Join Sir Cumference for wordplay, puns, and problem solving in this entertaining, medieval math adventure story about radius and the number Pi. . This time the math adventure is centered around a potion that changes Sir Cumference into a fire-breathing dragon. Can Radius change him back? Join Radius on his quest through the castle to solve a riddle that will reveal the cure. It lies in discovering the magic number that is the same for all circles. . The second in Sir Cumference series, Sir Cumference and the Dragon of Pi makes math fun and accessible for everyone.