Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.9 - The Coordinate Plane; Graphs of Equations; Circles - 1.9 Exercises - Page 102: 31

Answer

Area of rectangle ABCD is 24

Work Step by Step

The area of a rectangle is area = base times height $(b\times h)$ . In rectangle ABCD segment AB is equal to CD therefore using the distance formula $D=\sqrt (x-x)^2 + (y-y)^2$ we find the distance from A to B for the side. $D= \sqrt (1-5)^2 + (3-3)^2$ $D= \sqrt (-4)^2 + (0)^2$ $D= \sqrt (16+0)$ $D= \sqrt 16$ $D= 4$ for the other side we use the distance formula again to find the measure of A to C since AC is the same distance as BD $D= \sqrt (1-1)^2 + (3+3)^2$ $D= \sqrt (0)^2 + (6)^2$ $D= \sqrt (0) + (36)$ $D= \sqrt 36$ $D= 6$ Therefore the area is $6\times 4$ which is 24
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