a trianhualar park has sides 15m 18m and 20m . leaving an entrance 2m wide on one of its sides the park has been fenced with the barbed wire. how much length of wire will be needed?
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Perimeter of the triangular park = 15+18+20
➜53m
Width of entrance=2m
Length of wire = perimeter - width of entrance
➜53m - 2m=51m
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