A square has a side of 12 cm. Joining the midpoints of the sides of the square forms a smaller square, and continuing this process infinitely creates an infinite series of squares. Find the sum of the areas of all such squares.

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.