perimeter of the triangle is 39m

if one side is 12m and the other side is 12m what number is the missing side

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Let the length of the missing side be x.

Perimeter of triangle = sum of lengths of all three sides

39 = 12 + 12 + x

39 = 24 + x

or

24 + x = 39

x = 39 - 24

x = 15

So, length of missing side = x = 15 m

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