Find the ratio of the radii of two circles, at the centres of which two equal arcs subtend angles of `30^@` and `70^g`.

If the angles subtended by the chords of a circle at the centre of the circle are equal, then the chords are equal.

In the circle of 5cm.radius, what is the length of the arc which subtends and angle of 33^(@)15' at the centre.

Two parallel chords are drawn on the same side of the centre of a circle of radius R. It is found that they subtend and angle of theta and 2theta at the centre of the circle. The perpendicular distance between the chords is

Calculate the length of the arc of a circle of radius 31.0 cm which subtends an angle of pi/6 at the centre.

Find the length of the arc of a circle of radius 5 cm subtending an angle measure 45^@ .

O is the centre of the circle. If angleABD = 35^@ and angleBAC = 70^@ . Find angleACB

A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord on a point on the minor arc and also at a point on the major arc.

Equal chords of a circle subtend equal angles at the centre.