If `angle ABC = 142^(@) ` , find reflex ` angleABC`.

In the adjoining figure, AOB is the diameter and O is the centre of the circle. If angle BDC=60^@ , then find the value of angleABC .

What is a reflex angle?

In the adjoining figure, O is the centre of the circle. If angle AOB= 150^@ and angleBOC=100^@ , then find the value of angleABC .

In the adjoining figure angleBAD = a, angleABC = b and angleBCD = c and angle ADC = d , find the value of angle ABC in terms of a, c and d:

In the given is the centre of circle, PQ is a tangent to the circle at A. If angle BAQ=60^(@) then find angle ABC and angle APB.

A reflex angle measures