A is the centre of a circle with a radius of 8 cm and B is the centre of a circle whose diameter is 8 cm. If these two circles touch externally, find the area of the circle that has AB as its diameter.

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.