From an external point P, two tangents PA and PB are drawn to a circle with center O, touching the circle at points A and B respectively. If the chord of contact AB subtends an angle θ at the center of the circle O, what is the angle ∠APB between the tangents?

If B is the center of a circle and lines AD and CD are tangent segments drawn from an external point D, then which of the following classifications apply to quadrilateral ABCD? (a) Kite (b) Cyclic quadrilateral (c) Rhombus (d) Trapezium

In a parallelogram PQRS, rays PA and SA are the angle bisectors of ∠QPS and ∠RSP respectively. Find the measure of ∠PAS.