The perimeter of a five sided figure is 68 cm. If its four sides are 17 cm, 15 cm, 11 cm and 13 cm, then find the length of its fifth side.
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Perimeter = sum of all sides
68= 17+15+13+11+fifth side
68=56+ fifth side
68-56= fifth side
12= fifth side
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your answer is here mate
if the perimeter of 5 sided figure is 68 and four ides are 17,15,11amd 13
let fifth side be x ,,
so the fifth side is 17+15+11+13+x=68
56+x=68
x=68-56
so x =12
so we have got the fifth side as 12cm
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