Three circles are placed on a plane in such a way that each circle just touches the other two, each having a radius of 10 cm. Find the area of region enclosed by them.

Four circular cardboard pieces of radii 7 cm are placed on a paper in such a way that each piece touches two pieces. Find the area of the portion enclosed between these pieces.

The radius of a circle is 7 cm. Find its area

In Figure 6, three circles each of radius 3-5 cm are drawn in such a way that each of them touches the other two. Find the area enclosed between these three circles (shaded region).

Find the area enclosed by the circle of radius a.

A child makes a poster on a chart paper drawing a square A B C D of side 14 cm. She draws four circles with centre A ,\ B ,\ C and D in which she suggests different ways to save energy. The circles are drawn in such a way that each circle touches externally two of the three remaining circles. In the shaded region she write a message Save Energy. Find the perimeter and area of the shaded region.

Three circles each of radius 3.5 cm are drawn in such a way that each of them touches the other two. Find the area enclosed between these three circles (shaded region).

Find the equation of the circle touching : x-axis at the origin and having radius 10

Find the area of a circle of radius 5.6 cm.

Find the area of a circle of radius 4.2 cm

Four equal circles are described about the four corners of a square so that each touches two of the others as shown in Fig. 15.38. Find the area of the shaded region, each side of the square measuring 14 cm. (FIGURE)