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Quadrilateral Perimeter

Source: 2006 AIME A Problem 1

March 9, 2006
geometryperimeterAMCAIMEtrigonometryPythagorean TheoremAIME I

Problem Statement

In quadrilateral ABCD,∠BABCD, \angle B is a right angle, diagonal AC‾\overline{AC} is perpendicular to CD‾,\overline{CD}, AB=18,BC=21,AB=18, BC=21, and CD=14.CD=14. Find the perimeter of ABCDABCD.
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