Find the area enclosed by the circle of radius a.

(a). Calculate the area enclosed by a circle of radius 0.56 m to the correct number of significant figures. (b) . Calculate the area enclosed by a circle of diameter 1.12 m to the correct number of significant figures.

Find the area enclosed by the circle x ^(2) +y ^(2) =9.

Find the smaller area enclosed by the circle x ^(2) + y ^(2) =4 and the line x + y =2.

Three circles each of radius 7cm are drawn in such a way that each of them touches the other two. Find the area enclosed between the circles.

Find the area enclosed by the circle x^(2)+y^(2)=a^(2)

Find the area enclosed by the circle x^(2)+y^(2)=25

Find the area of a sector of a circle of radius 7 cm and central angle 45°.

Find the area of a sector of a circle of radius 7 cm and central angle 90^(@) .

Find the area of a sector of a circle of radius 28cm and central angle 45^(@) .

In the figure all the circles have radius 'a' and their centres form the vertices of a regular hexagon.Prove that the area enclosed between the circles is nearly equal to (24)/(25)a^(2)