The measure of the angle subtended at the centre of a circle by a quarter of its circumference `"__________"` degrees.

The mesure of an angle subtended at the centre of circle by an are to its radius is one "__________"

Find the degree measure of the angle subtended at the centre of a circle of radius 100 cm by an arc of length 22 cm (Use pi = (22)/(7) ).

The angle subtended at the centre of a circle , by a chord whose length is equal to the radius of the circle will be

Find in degrees the angle subtended at the centre of a circle of diameter 50cm by an arc of length 11cm.

Find in degrees the angle subtended at the centre of a circle of diameter 100cm by an arc of length 22 cm.

Angle subtended in a circle by the arc less than a semi-circle is an _______ angle.

If alpha_1 and alpha_2 be the circular measure of the angles subtended by the arcs of lengths s_1,s_2 at the centres of the circles whose radii are a_1,a_2 respectively , then show that the angle subtended at the centre by the arc of length (s_1+s_2) of a circle whose radius is 1/n(a_1alpha_1+a_2alpha_2) will be n radians.

Perimeter of a sector is equal with half of the circumference of a circle. If the angle subtended by the sector at the centre of the circle be n(pi/2-1) , then find the value of n