Sir Cumference and the Dragon of Pi

Sir Cumference

Sir Cumference, Lady Di of Ameter, and Radius are back in their second Math Adventure! This time, a potion has changed 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.

Booko found 8 book editions

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Nov, 2019

Mar, 2018

Jan, 2013

Jan, 2013

United States Jan, 2014
New: $20.69

Used: $14.25
Jan, 2002

Used: $43.01
Oct, 2001
New: $58.99

Used: $27.45
Jan, 1999
New: $37.87

Used: $30.13

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