If the altitude of an equilateral triangle is 9 cm then find out its area?
Altitude of equilateral triangle = 9 cm √3/2 × side = altitude side = (9×2)/√3 = 6√3 cm Area of equilateral triangle = √3/4 × side² = √3/4 × 6√3 × 6√3 = 27√3 cm²
Match the following:
