Geometry: Common Core (15th Edition)

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

Chapter 6 - Polygons and Quadrilaterals - 6-2 Properties of Parallelograms - Practice and Problem-Solving Exercises - Page 364: 23

Answer

$WX = 4.5$

Work Step by Step

Theorem 6-7 states that if three or more parallel lines cut off congruent segments off of a transversal, then they will cut off congruent segments off of any transversal. We see from the diagram that the transversals line $\overline{PS}$ is cut off in equal segments by the four parallel lines. We can then deduce that lines $VW$ and $TU$ are also transversals that are cut off in congruent segments by the same four parallel lines. We now know that $\overline{YX}$ is congruent to $\overline{WY}$, so they both have lengths of $2.25$. Since $\overline{WX}$ is made up of $\overline{YX}$ and $\overline{WY}$, we just add the two segments together to find the total length of $WX$: $WX = YX + WY$ Let's plug in what we know: $WX = 2.25 + 2.25$ Add to solve: $WX = 4.5$
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