Angle ABC is `40^@` (see figure) and the area of the circle is `81 pi`. If CB is a diameter of the circle, how long is arc AXC?

If angle ABC is 40 degrees (see figure), and the area of the circle is 81pi , how long is arc AXC?

In the following figure, O is the centre of the circle. AB is an arc of the circle, such that angle AOB=80^@ .Find angle ACB .

The area of sector is 40 pi cm^(2) and the length of the correspondig arc is 10 pi cm, then the diameter of the circle is

Triangle ABC is inscribed in a circle, such that AC is a diameter of the circle and angle BAC is 45^@ . If the area of triangle ABC is 72 square units, how larger is the area of the circle than the area of triangle ABC ?

BE and CD are both diameters of circle with centre A (see figure). If the area of the circle is 180 "units"^(2) , what is the total area of the shaded regions?

The circumference of a circle whose area is 81 pi r^2 , is

If the circumference and the area of a circle are numerically equal, then diameter of the circle is (a) pi/2 (b) 2pi (c) 2 (d) 4

If the circumference and the area of a circle are numerically equal, then diameter of the circle is (a) pi/2 (b) 2pi (c) 2 (d) 4

In the figure, seg AB is the diameter of the circle, /_ABC=30^(@) , Find (1) m(arc AXC) (2) m(arc BYC)