If an arc forms `72^(@)` at the centre of the circle. Find the ratio of its length to circumference of circle.

Find the ratio of radius to circumference of the circle.

Two arcs of two different circle are of equal lengths. If these arcs subtends angles of 45^(@) and 60^(@) at the centre of the circles. Find the ratio of the radii of the two circles.

The angle of a sector of a circle is 72^(@) and radius of the circle is 10 m. The ratio of the circumference of the circle and the length of the arc of the sector is ________.

In a circle of radius 6cm, a chord of length 10cm makes an angle of 110^(@) at the centre of the circle.Find: the circumference of the circle the area of the circle the length of the arc AB,the area of the sector OAB

The angle of a sector of a circle is 108^(@) and radius of the circle is 15 m. The ratio of the circumference of the circle and the length of the arc of the sector is _______

In a circle of radius 6cm, a chord of length 10cm makes an angle of 110^0 at the centre of the circle. Find: the circumference of the circle the area of the circle the length of the arc AB, the area of the sector OAB

Two arcs of the same length subtend angles of 60^@ and 75^@ at the centres of the circles.What is the ratio of the radii of the two circles?