The radius of the circle given above is 7cm and the angle subtended by the arc is 60∘. If the area of ΔOAB is 21cm2, then the area of segment APB is___ .(Take the value of π as 227)

The radius of the circle given above is 7cm and the angle subtended by

1.	The radius of the circle given above is 7cm and the angle subtended by the arc is 60∘. If the area of ΔOAB is 21cm2, then the area of segment APB is___ .(Take the value of π as 227)
Answer» The radius of the circle given above is 7cm and the angle subtended by the arc is $60^{\circ}$ . If the area of $Δ$ OAB is $21 {c m}^{2}$ , then the area of segment APB is___ .(Take the value of $π$ as $\frac{22}{7}$ )