Answer
2.5 or -2.5
Work Step by Step
If A=0, then R must equal 5 or -5 for $\overline{AR}=5$. To find the midpoint, find the average of the two points. This gives $\frac{0+5}{2}=2.5$ and $\frac{0-5}{2}=-2.5$.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - 1-3 Measuring Segments - Practice and Problem-Solving Exercises - Page 24: 26
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