Question

Perimeter of an isosceles triangle is 35 cm if the length of a the congruent sides is 3 times the length of the third side what are the dimensions

Answer 1

Let the length of the shortest side = x

The two longer sides that are equal = 3x

The are two equal longer sides, so their total is 3x + 3x = 6x

3x+ 3x + x= 35 Collect like terms on the left

7x = 35 Divide by 7 on both sides

x = 35/7

x = 5

Answer

Two long sides -- 15 cm each

Shortest side -- 5 cm