An umbrella has 8 ribs which are equally spaced. Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.

Find the area of the square that can be inscribed in a circle of radius 8 cm.

If an isosceles DeltaABC in which AB=AC=6cm is inscribed in a circle of radius 9 cm, find the area of the triangle.

Find the distance between two parallel tangents of a circle of radius 3 cm.

Find the length of the chord of a circle of radius 8 cm which subtends a right angle at the centre.

The difference between the radii of a smaller circle and a larger circle is 7cm and the difference between the areas of the two circles is 1078 sq.cm . Find the radius of the smaller circle.

Find the area of the ring shaped region enclosed between two concentric circles of radii 4cm and 3cm.

Find the area of the segment of a circle of radius 12cm whose corresponding sector has a central angle of 60^@

Two circles touch each other internally. Sum of their areas is 25 pi sq. cm If the distance between their centres is 1cm,find their radii.

A hand fan is made up of cloth fixed in between the metallic wires. it is in the shape of a sector of a circle of radius 21cm anf of angle 120^@ as shown in the figure. calculate the area of the cloth used and also find the total length of the metallic wire required to make such a fan.