Elementary Geometry for College Students
Key differences between 6th and 5th editions
 Time lapse between current and previous editions: 4 years (2014 vs 2010).
 Alexander & Koeberlein's Elementary Geometry for College Students was first published in 1992.
 The Sixth edition includes about 150 new exercises.
 New material on parabolas.
 Completely new section 10.6 "A ThreeDimensional Coordinate System" discusses points, lines, the midpoint formula, planes, line and plane relationships. The section includes the table on line relationships in Cartesian space.
 New Appendixes:
 A.4 Factoring and Quadratic Equations
 A.5 The Quadratic Formula and Square Root Properties
6th Edition of
Elementary Geometry for College Students
eBook, 624 pages
eBook ISBN: 9781285965901
Published by: Cengage Learning, January 01, 2014
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 $28.99 
Hardcover, 624 pages
ISBN10: 1285195698
ISBN13: 9781285195698
Published by: Cengage Learning, January 01, 2014
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 $79.99

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5th Edition of
Elementary Geometry for College Students
Hardcover, 624 pages
ISBN10: 1439047901
ISBN13: 9781439047903
Published by: Cengage Learning, January 01, 2010
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 $65.00

From: $28.48  
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4th Edition of
Elementary Geometry For College Students
Hardcover, 519 pages
ISBN10: 061864525X
ISBN13: 9780618645251
Published by: Houghton Mifflin Company, January 10, 2006
Book Store  New  Used  Rent 
 $50.00

From: $19.72  
 $172.56 

$113.74 due: Dec 22
$108.05 due: Dec 20
$102.37 due: Nov 20

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Used previous 5th edition costs $1.4 less than the used 6th.