SOLUTION: the lengths of the sides of a triangle are in the ratio 5:6:7. Describe the length of the longest side if the perimeter is less than 54 cm.

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Question 333182: the lengths of the sides of a triangle are in the ratio 5:6:7. Describe the length of the longest side if the perimeter is less than 54 cm.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5n+6n+7n=18n
18n<54
n<54/18
n<3
7*3=21 for the longest side.
Thus the longest side is less than 21.