Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 9 - Analytic Geometry - Section 9.2 The Parabola - 9.2 Assess Your Understanding - Page 667: 1


$D=\sqrt {(x_2−x_1)^2+(y_2−y_1)^2}$

Work Step by Step

The distance $D$ between two points $P_1(x_1,y_1)$ and $P_2(x_2, y_2)$ can be defined by the Pythagorean theorem. Therefore, the distance between $P_1$ and $P_2$ is given by the formula: $D=\sqrt {(x_2−x_1)^2+(y_2−y_1)^2}$
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