Area of a sector

Find the areas of a sector of angle 120^(@) and is corresponding major sector of a circle of radius 21cm.

If ABCD is a square, then the area of the sector shown in the figure is

Area of the sector is ………….time the length of its corresponding are

The angle of a sector is 120^(@) and its radius is 21 cm. The area of the sector is ______.

The perimeter of a sector is p. The area of the sector is maximum when its radius is

The perimeter of a sector is p. The area of the sector is maximum when its radius is

If the radius of the sector is 5 and length of its corresponding arc is 14, then area of the sector is …………. .

The angle of a sector of a circle is 90^(@) . The ratio of the area of the sector and that of the circle is ______.