Errata – Geometry, 4th Edition

Cover for 4th Edition

Edition 4.2	Edition 4.1	Edition 4.0
Release Date: August, 2010 Differentiating Mark: Back Cover, Bottom Right Corner	Release Date: December 1, 2009	Release Date: May 1, 2009

The Geometry Guide (112 pages) illustrates every geometric principle, formula, and problem type tested on the GMAT. Understand and master the intricacies of shapes, planes, lines, angles, and objects.

4.1

Page	Loc	Description	Erroneous Text	Correction
91	Mid	Diagram next to problem 70 should be moved to page 92, next to problem 117.
77	Bot	In the solution to #5, the points to substitute should be (-3, 0), not (3, 2).	Substitute the coordinates (3, 2) for x and y and solve for z.	Substitute the coordinates (-3, 0) for x and y and solve for z.
37	Bot	In the last sentence of the solution to #4, replace the word 'simplify' with 'simply'.	Alternatively, we can simplify square the base ratio of 1:2.	Alternatively, we can simply square the base ratio of 1:2.
50	Top	Question #12 should state that CB is a dimater of the circle.
16	Mid	The parallelogram on the right side of the page (with base 5 and height 8) has dimensions that are not possible.		If the height is 9, the figure is possible.
92	Mid	Diagram from page 91 next to problem 70 should be moved next to problem 117 on this page.
43	Bot	The first sentence of the last paragraph is repeated and should be removed.
89	Mid	Explanation for problem 164 incorrect.	v = 1 – (-r + 1) –> v = r + 2	v = 1 – (-r + 1) –> v = r

4.0

Page	Loc	Description	Erroneous Text	Correction
91	Mid	Diagram next to problem 70 should be moved to page 92, next to problem 117.
77	Bot	In the solution to #5, the points to substitute should be (-3, 0), not (3, 2).	Substitute the coordinates (3, 2) for x and y and solve for z.	Substitute the coordinates (-3, 0) for x and y and solve for z.
50	Top	Question #12 should state that CB is a dimater of the circle.
43	Bot	The first sentence of the last paragraph is repeated and should be removed.
37	Bot	In the last sentence of the solution to #4, replace the word 'simplify' with 'simply'.	Alternatively, we can simplify square the base ratio of 1:2.	Alternatively, we can simply square the base ratio of 1:2.
89	Mid	Explanation for problem 164 incorrect.	v = 1 – (-r + 1) –> v = r + 2	v = 1 – (-r + 1) –> v = r
16	Mid	The parallelogram on the right side of the page (with base 5 and height 8) has dimensions that are not possible.		If the height is 9, the figure is possible.
92	Mid	Diagram from page 91 next to problem 70 should be moved next to problem 117 on this page.
96	Mid	Erroneous exclusion of problem #77 from the Quant Review among Triangles & Diagonals problem set.	Triangles and Diagonals 12th Edition: 48, 145, 147, 152	Triangles and Diagonals 12th Edition: 48, 145, 147, 152 Quantitative Review: 77
101	Top	Incorrect reference to OG problems that were in the 11th but are not in the 12th edition.	For instance, to solve Problem Solving #238 in The Official Guide for GMAT Review, 12th Edition algebraically, you have to set up two equations with two unknowns, translating an area relationship into one of those equations. However, the area formulas required are only those of rectangles. Likewise, Problem Solving #248 in…	For instance, to solve Problem Solving #145 in The Official Guide for GMAT Quantitative Review, 2nd Edition, you have to complete several steps, using both Triangle concepts and Circle concepts. However, once you have labeled the diagram appropriately, each step is itself straightforward. Likewise, Problem Solving #229 in…