The bisectors of opposite angles of a cyclic quadrilateral ABCD intersect the circle circumscribing it at the points P and Q. If radius of the circle is 12 cm, find the distance between points P and Q.
The perimeter of a quadrilateral is 48cm. If the first three sides of a quadrilateral, taken in order are 14cm,13cm, and 12cm respectively, and the angle between fourth side and the third side is a right angle, find the area of the quadrilateral.