Geometry: Common Core (15th Edition)

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

Chapter 6 - Polygons and Quadrilaterals - Mid-Chapter Quiz - Page 398: 4

Answer

$x = 1$ $y = 2$

Work Step by Step

The diagonals of a parallelogram bisect one another; therefore, we can set the two bisected segments of each diagonal equal to one another. Let's start with the diagonal in which the segments have the same variable: $2x = 4x - 2$ Subtract $4x$ from each side of the equation to move variables to the left side of the equation: $-2x = -2$ Divide both sides by $-2$ to solve for $x$: $x = 1$ Now, we can set the other two segments on the other diagonal equal to one another: $5x - 1 = 2y$ Substitute $1$ for $x$: $5(1) - 1 = 2y$ Multiply first, according to order of operations: $5 - 1 = 2y$ Subtract to simplify: $2y = 4$ Divide both sides of the equation by $2$ to solve for $y$: $y = 2$
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