Calculate the area and perimeter of an equilateral triangle.
This calculator uses metres for measurements.
Equilateral triangle = a triangle with three sides of the same length.
A = ab/4 P = 𝛑R(1+(3H)/(10+√(4-3*H))) where A is the area of the equilateral triangle a length of the short diameter b length of the long diameter P the perimeter of the ellipse 𝛑 = 3.14159265 R = (a+b)/2 S = (a-b)/2 H = R²/S²
one metre (m) = 3.28083989501312 feet (ft) one metre (m) = 39.3700787401575 inches (in) one square metre (m²) = 10.7639104167097 square feet (ft²) one square metre (m²) = 1550.0031000062 square inches (in²)