Answer
$d=11.7$
Work Step by Step
Use the distance formula:
$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}$
$d=\sqrt{(-8-0)^2+(20-12)^2+(12-15)^2}$
$d=\sqrt{(-8)^2+(8)^2+(-3)^2}$
$d=\sqrt{64+64+9}$
$d=\sqrt{137}$
$d\approx11.7$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
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 56: 61
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