Question

The perimeter of an isosceles triangle is 7.5m, and the length of a leg is 2m. Find the length of the base.

Answer 1

The legs of an isosceles triangle are congruent; they have the same length, so if one leg measures 2 m, the other leg also measures 2 m.

2m + 2m + b = 7.5 m

b + 4 m = 7.5 m

b = 3.5 m

The length of the base is 3.5 m.