Sector angle ,θ= 30° =π×30°/180° = π/6 radians
Radius, R= 15 cm
Area A= (1/2)R²θ where θ is in radians
Hence A= (1/2)×15²× π/6 =58.90 cm²
A = [ 30/360 ] [ π x 15² ] cm²
A = 58•9 cm²