Geometry: Common Core (15th Edition)

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

Chapter 1 - Tools of Geometry - Common Core Cumulative Standards Review - Selected Response - Page 77: 11



Work Step by Step

$d_{AB}=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ substitute given values $d_{AB}=\sqrt{(-3-1)^2+(-1-7)^2}$ simplify in parentheses $d_{AB}=\sqrt{(-4)^2+(-8)^2}$ simplify $d_{AB}=\sqrt{16+64}$ $d_{AB}=\sqrt{80}$
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