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Gruber's Math Workbook Help

matt110029matt110029 Registered User Posts: 8 New Member
edited November 2012 in SAT Preparation
Does anyone have Gruber's Math Workbook that can help me understand the problem on page 268.


Why is the second AB not AD since its the base of the whole triangle? And where did the 1/3 come from?
Post edited by matt110029 on

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