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 45 , then how long is the base of isosceles triangle ?
"the base of the isosceles triangle is 45 - 20 - 20 = 5 units the answer is a ."
subtract(subtract(45, divide(60, const_3)), divide(60, const_3))