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?

If the area of a circle is 64pi , which is the circumference of the circle?

Find the area of a circle of diameter 7 cm.

The circumference of a circle is 17pi . What is the diameter?

The diameter of a circle is 28 cm. Find its : area

Find the circumference of the circle whose area is 16 times the area of the circle with diameter 1.4 m

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?

In the given figure, /_COB = 40^(@), AB is the diameter of the circle. Find /_CAB :

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