area and perimeter of an equilateral triangle
Perimeter: Perimeter of an equilateral triangle whose side is 'a' units = (a+a+a) units = 3a units. Area: Area of an equilateral triangle whose side is 'a' units. = a2. Note: *SAT is a trademark owned by the College Board, which was not involved in the production of, and does not endorse, this site or its products.