Sir Cumference

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solving in this angle-packed math adventure. In the third installment of the beloved Sir Cumference series, Radius must prove himself on his quest for knighthood by rescuing a king. Sent off with the family medallion for luck, Radius dodges dangers and dragons. The ultimate challenge lies in a mysterious castle with a maze of many angles.Cindy Neuschwander is an elementary school teacher who loves teaching math. She also enjoys traveling, reading, and writing stories. She thought up Sir Cumference while visiting medieval castles in England. Cindy lives in Pleasanton, California.More than anything, Radius wanted to be a knight. Every day, he practiced riding, sword fighting, and archery. His teacher was the brave old Sir D’Grees.
            One day, Radius’s parents, Sir Cumference and Lady Di of Ameter, came to watch his lessons. “Show us what you have learned,” they said.
            In the riding ring, Radius mounted his horse and Sir D’Grees gave directions. “Knightly right angle – trot!” shouted Sir D’Grees.
            Radius rode his horse at a trot to the center of the ring and made an exact right angle turn. It formed a perfect corner.