Asked by kaylee

a rectangle has a base of 25 in. and a height of 15 in. if the shape is dilated with a scale factor of .6, what is the area of the new shape?

Answers

Answered by Reiny
areas of similar shapes are proportional to the square of their sides
area of original
= (1/2)(25)(15) = 187.5

x/187.5 = .6^2/ 1
x = .36(187.5) = 67.5

or

new dimensions:
.6(25) = 15
.6(15) = 9
new area = (1/2)(15)(9) =67.5
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