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.
Radius, the son of Sir Cumference and Lady Di of Ameter, sets off on his first quest with the family medallion (a protractor) in hand. The geometry wordplay is more engaging than the overlong story itself, and although the illustrations convey the medieval setting, they don't clearly depict how to use a protractor to measure angles.