Question

The perimeter of an isosceles triangle is 15.6 m. Find the lengths of its sides, if: The base is 3 m bigger than a leg.

Answer 1

So, an isosceles triangle has 2 equal sides, we will call them x.

The base can be modeled by 3+x

So, the perimeter is equal to x + 3+x + x

So

15.6 = 3x + 3

12.6 = 3x

4.2 = x

So, the lengths of the sides are 4.2, 4.2, 7.2