Geometry: Common Core (15th Edition)

Published by Prentice Hall

Chapter 1 - Tools of Geometry - 1-7 Midpoint and Distance in the Coordinate Plane - Practice and Problem-Solving Exercises - Page 54: 7

-1.5

Work Step by Step

The midpoint of a segment is the average of the two endpoints. $M=\frac{-9+6}{2}=\frac{-3}{2}=-1.5$

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