The ratio of the measures of the sides of a triangle is 5:7:8 and has a perimeter of 320 inches. What is the measure of each side?

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The ratio of the measures of the sides of a triangle is 5:7:8, and its perimeter is 40 inches. what is the measures of each side of the triangle 
Sides are (5/20) x 40 = 10 inches
(7/20) x 40 = 14 inches, and (8/20) x 40 = 16 inches respectively.