Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 6 - Polygons and Quadrilaterals - 6-4 Properties of Rhombuses, Rectangles, and Squares - Practice and Problem-Solving Exercises - Page 381: 44

Answer

x = 7.5 ; y = 3 ;

Work Step by Step

Figure is a rhombus with right angles = square The diagonals bisect each other so: 2x - 1 = 3y + 5 2x = 3y + 6 AC = BD = 4x - y + 1 (2x - 1) + (3y + 5) = 4x - y + 1 2x + 3y + 4 = 4x - y + 1 Sub. 3y + 6 for 2x : 4y + 3 = 3y + 6 4y - 3y = 6 - 3 y = 3 And x = (4y + 3) / 2 = (4(3) + 3) / 2 = 15 / 2 = 7.5 x= 7.5 and y = 3
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