Geometry: Common Core (15th Edition)

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

Chapter 1 - Tools of Geometry - 1-7 Midpoint and Distance in the Coordinate Plane - Practice and Problem-Solving Exercises - Page 54: 38


$d=7.1$ $M(-1.5,0.5)$

Work Step by Step

Use the distance formula: $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ $d=\sqrt{(1-(-4))^2+(3-(-2))^2}$ $d=\sqrt{(5)^2+(5)^2}$ $d=\sqrt{25+25}$ $d=\sqrt{50}$ $d\approx7.1$ Use the midpoint formula to find the x-coordinate of the midpoint: $x_m=\frac{x_1+x_2}{2}=\frac{-4+1}{2}=\frac{-3}{2}=-1.5$ Use the midpoint formula to find the y-coordinate of the midpoint: $y_m=\frac{y_1+y_2}{2}=\frac{-2+3}{2}=\frac{1}{2}=0.5$
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