an equilateral triangle is inscribed in a circle.if the radius is 10 cm .What is the side length
We can use the Law of Cosines to solve this.....we have :
s^2 = 200 - 200cos(120)
s^2 = 200 + 100
s^2 = 300
s =sqrt(300) = 10*sqrt(3) cm ≈ about 17.32 cm
