SOLUTION: The problem is: The perimeter of a triangle is 84cm. Two sides are three times the length of the third side. What are the lengths of the three sides? I cannot figure out what f

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Question 777534: The problem is: The perimeter of a triangle is 84cm. Two sides are three times the length of the third side. What are the lengths of the three sides?
I cannot figure out what formula to use to solve it.
Found 2 solutions by rothauserc, solver91311:
Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website!
let x be the length of the third side
3x +3x +x = 84
7x = 84
x = 12, and
the three sides are 36 cm, 36 cm, 12 cm

Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

is the third side and is each of the other two sides. The perimeter is the sum of all the sides.

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it