SOLUTION: In an isosceles triangle, the length of one of the equal sides ie three times the length of the third side. The perimeter is 21 m. Find the length of each side.

Algebra ->  Triangles -> SOLUTION: In an isosceles triangle, the length of one of the equal sides ie three times the length of the third side. The perimeter is 21 m. Find the length of each side.      Log On


   

Question 17711: In an isosceles triangle, the length of one of the equal sides ie three times the length of the third side. The perimeter is 21 m. Find the length of each side.
Answer by xcentaur(357) About Me  (Show Source):
You can put this solution on YOUR website!
let the sides be x,x and y
then 2x+y=21 m.....[perimeter given]
also given x=3y
then 2(3y)+y=21
7y=21
y=3
x=3y=9


So we get the lengths of the sides as:
3m,9m,9m


Hope this helps,
Prabhat