SOLUTION: Isosceles triangle is a triangle with two congruent(equal)sides. If the third side is 3 times the length of the congruent sides and the perimeter is 75 centimeters. Find the length

Algebra ->  Triangles -> SOLUTION: Isosceles triangle is a triangle with two congruent(equal)sides. If the third side is 3 times the length of the congruent sides and the perimeter is 75 centimeters. Find the length      Log On


   



Question 310838: Isosceles triangle is a triangle with two congruent(equal)sides. If the third side is 3 times the length of the congruent sides and the perimeter is 75 centimeters. Find the length of all 3 sides of the triangle.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = the length of one of the congruent sides.
The perimeter (P) can be expressed as:
P+=+x%2Bx%2B3x
P+=+5x Substitute P = 75.
75+=+5x
x+=+15 The lengths of the sides are:
15cm., 15cm., and 45cm.