## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 1 - Tools of Geometry - 1-7 Midpoint and Distance in the Coordinate Plane - Lesson Check - Page 53: 3

8.5

#### Work Step by Step

Let $K(-9,8)$ be $(x_1,y_1)$. Let $L(-6,0)$ be $(x_2,y_2)$. Use the distance formula. $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ $d=\sqrt{(-6-(-9))^2+(0-8)^2}$ $d=\sqrt{(3)^2+(-8)^2}$ $d=\sqrt{9+64}$ $d=\sqrt{73}$ $d\approx8.5$

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