Discovering geometry with the Geometer's sketchpad 

 - Emeryville :  Key Curriculum,  1997 
 - 198 p. 
<br/><br/><label>ISBN: </label>1559532092 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry
<br/><br/><label>Subjects--Index Terms: </label>Hình học 
<br/><br/><label>Dewey Class. No.: </label>516  / DIS 1997