Exercise

Find the area of sector whose radius is $7 \mathrm{cm}$ with the angle $72°$. Take $\mathrm{\pi }=\frac{22}{7}$

A chord of a circle subtends an angle of $60°$ at the centre. If the length of the chord is $12 \mathrm{cm}$, find the area of the two segments into which the chord divides the circle (take $\mathrm{\pi }=3.14$ and $\sqrt{3}=1.73$)

Find the perimeter of the major sector.

A frame for a mirror is in the shape of a rectangle with a curved top as shown in the diagram. The vertical sides of the frame are $50 \mathrm{cm}$ long, and the top is an arc with central angle $97°$ and radius$20 \mathrm{cm}$. Calculate the perimeter of this frame.

In the figure, three circles each of radius $3.5 \mathrm{cm}$ are drawn in such a way that each of them touches the other two. Find the area enclosed between these three circles.

Find the length of the major arc.

Find the length of the minor arc.

If the perimeter and the area of a circle are numerically equal, then the radius of the circle is: