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The area of the shaded region is 78 square inches. All angles are right angles and all measurements are given in inches. What is the perimeter of the non-shaded region?

 

 Nov 18, 2020
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10*9 = 90 in=total area

so small rectangle area = 90 -78 = 12 in2

2 * x = 12  in2

x = length = 6 in

perimeter is thus   2+2 + 6+ 6 = 16 in

 Nov 18, 2020

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