Posamentier , Alfred S. , <br/><br/>
Secrets of triangles: a mathematical journey   
by Alfred S. Posamentier  
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 - New York:  Prometheus Books,  2013. 
 - 387 p. :  ill.;  24 cm. 
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 -   .
<br/><br/> Includes bibliographical references  and index 
<br/><br/><label>ISBN: </label>9781616145873 
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<br/><br/><label>Nat. Bib. No.: </label>  
<br/><br/><label>Nat. Bib. Agency Control No.: </label>  
<br/><br/><label>Subjects--Meeting Names: </label><br/>  
<br/><br/><label>Subjects--Index Terms: </label>Geometry Trigonometry 
<br/><br/><label>LC Class. No.: </label> /  
<br/><br/><label>Dewey Class. No.: </label>516.154 POS