Neuschwander, Cindy. <br/><br/>
Sir Cumference and the Great Knight of Angleland :  a math adventure / 
by Cindy Neuschwander ; illustrated by Wayne Geehan. 
 - Watertown, MA :  Charlesbridge,  c2001. 
 - 32 p. :  col. ill ;  25 cm. 
<br/><br/> School Library Journal. 
<br/><br/> To earn his knighthood, Radius must find and rescue a missing king.  His father, Sir Cumference, and his mother, Lady Di of Ameter, give him a circular medallion, (a protractor), that he uses to find his way through a maze of many angles. 
<br/><br/> 4.7  Follett Library Resources.  6.3.  3-6  Follett Library Resources. 
<br/><br/><label>ISBN: </label>032926124X 141310729X 157091169X (pbk.) 1570911703 (lib. bdg.) 9780329261245 9781413107296 9781570911699 9781570911705 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry--Juvenile literature.<br/>Geometry.<br/>Geometry.
<br/><br/><label>LC Class. No.: </label>QA445.5  / .N49 2001 
<br/><br/><label>Dewey Class. No.: </label>516