the perimeter of an equilateral triangle is 60 . if one of the sides of the equilateral triangle is the side of an isosceles triangle of perimeter 65 , then how long is the base of isosceles triangle ?
the base of the isosceles triangle is 65 - 20 - 20 = 25 units the answer is d .
subtract(subtract(65, divide(60, const_3)), divide(60, const_3))