The spinner is a circle and the three sectors are congruent with means that each sector has the same area. The formula for the area of a sector is\ A = (1/2) r² θ We are given with r = 3 in θ = 120° Converting degrees to radians θ = 120° (π/180°) θ = 2π/3
Solving for the area A = (1/2) (3)² (2π/3) A = 3π ≈ 9.24 in²
Used show you have more than what is needed. Example is you need 6 slices of pizza for all your friends but have 7 slices you have more than is needed.
