Question

How many distinct, equilateral triangles with a perimeter of 60 units have integer side lengths?

Answer 1

Equtorial triangles are geometric structures which are designed of equivalent length on all the three sides.  

Then, Perimeter of a triangle (addition of all the sides) = a + b + c

Perimeter = 60

We know that, a = b = c in case of equilateral triangle.

Such that,

3a = 60

a = 20

Hence one equilateral triangle with side measurement of 20 units can be formed with the perimeter of 60 units.