Geometry: Common Core (15th Edition)

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

Chapter 12 - Circles - 12-1 Tangent Lines - Got It? - Page 766: 5



Work Step by Step

We first identify the expression: $$PX=PZ=15 \\ YR=ZR=17 \\ QY=XY$$ Thus: $$ \left(15\right)\left(2\right)+\left(17\right)\left(2\right)+\left(2QY\right)=88 \\ 2QY+64=88\\ 2QY=24 \\ QY=12$$
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