Geometry: Common Core (15th Edition)

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

Chapter 1 - Tools of Geometry - 1-3 Measuring Segments - Lesson Check - Page 23: 3



Work Step by Step

To find the coordinate of the midpoint, first find the length of $\overline{AG}$. AG=$|-3-3|=|-6|=6$ Since AG=6, the midpoint is half way between, or 3 units from, each endpoint. One endpoint is -3, so: Midpoint=$-3+3=0$ The coordinate of D is 0, so D is the midpoint.
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