Question

Given a circle with centre O .Draw a cyclic quadrilateral ABCD. Extend the side AB til D such that angle CBD = 70 . Join A and C to the centre O. Find both the angles formed at the centre that is angle AOC and reflex angle AOC

Answer 1

Answer:

find ∠ABO in Figure 4, where O is the centre of the circle ... Through C a line is drawn to intersect BP produced in Q,such that angle ABQ=angle ... ABCD is a quadrilateral inscribed in a circle with centre o.