A , B , E ARE POINTS ON CIRCLE AB IS DIAMETER WITH O AS A CENTRE AC AND BD ARE PERPENDICULARS ON A LINE PQ . BD MEETS THE CIRCLE AT E . PROVE THAT AC = ED
By property that
∠AEB =
Similarly,
All the angles in the quad. AEDC =
∴ AEDC is a rectangle and AC = ED ( opposite sides of rectangle are equal )