what is the height of an equilateral triangle
Formulas and Calculations for a equilateral triangle: 1  Perimeter of Equilateral Triangle: P = 3a. 2  Semiperimeter of Equilateral Triangle: s = 3a / 2. 3  Area of Equilateral Triangle: K = (1/4) * â3 * a 2. 4  Altitude of Equilateral Triangle h = (1/2) * â3 * a. 5  Angles of Equilateral Triangle: A = B = C = 60Â°.