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4 years ago

11

a certain polygon has 9 sides.Two of the sides have length of a,and 4 sides each have length 3a.The lengths of the remaining thr

ee sides are 11,12, and 13.If the perimeter of the polygon is 92,what is the value of a?

1 answer:

melamori03 [73]4 years ago

3 0

92 = 11 + 12 + 13 + 2(a) + 4(3a)

92 = 36 + 2a + 12a

92 = 36 + 14a

-36 -36

56 = 14a

56/14 = 14a/14

a = 4

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