SOLUTION: The base of an isosceles triangle is one-third the length of each of the congruent sides. The perimeter of the triangle is 84 cm. How long is the base?

Question 161696: The base of an isosceles triangle is one-third the length of each of the congruent sides. The perimeter of the triangle is 84 cm. How long is the base?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Calls the sides
Call the base
The perimeter is then

It is given that
, so

Multiply both sides by

cm
check:

OK
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