4. Points P and Q lie on side AB and AC of triangle ABC respectively such that segment PQ is parallel to side BC. If the ratio of AP:PB is 2:3, and area of ? APQ is 8 sq cm, what is the area of trapezium PQCB?
5. A quadrilateral is inscribed in a circle. If the opposite angles of the quadrilateral are equal and length of its adjacent sides are 6 cm and 8 cm, what is the area of the circle?
6. In a triangle the length of the side opposite the right angle is 9?3 cm, what is the length of the side opposite to the angle which measures 30 degree?