Thank you! A, B, C and D are all on the circle. If the circle was a clock, point A would be around 11:00, B is around 9, C is around 6 and D is around 4 ... P is in the middle. A straight line runs vertical to the circle touching the circle at point B. E is the point at the bottom of the straight line. Apologies for the lack of correct terms.

Question

Thank you!  A, B, C and D are all on the circle.  If the circle was a clock, point A would be around 11:00, B is around 9, C is around 6 and D is around 4 ... P is in the middle.  A straight line runs vertical to the circle touching the circle at point B.  E is the point at the bottom of the straight line.  Apologies for the lack of correct terms.