If the arc length and the circumference of a circle are in the ratio 1:5, find the angle subtended by the arc at the centre.
If the ratio of the arc AB to the circumference of a circle is 1:3,then measure of the angle subtended by the arc at the centre is
Two arcs APB and CQD of a circle are in the ratio 5 :7. The angle subtended by arc CQD at the centre is ___ degrees
Two arcs APB and CQD of a circle are in the ratio 5 :7. The angle subtended by arc APB at the centre is 150o.