1. Find the perimeter (in cm) of a rhombus whose diagonals are 36 cm and 48 cm.   Hint Hint       2. The diagonals of a quadrilateral intersect at right angles. The lengths of the diagonals are 16 cm and 13 cm respectively. Calculate the area (in cm2) of the quadrilateral.   Hint       3. Calculate the area (in cm2) of a rhombus whose one side is 25 cm and one diagonal is 30 cm.   Hint       4. Find the area (in cm2) of a parallelogram whose base is 42 cm and height is 9 cm.   Hint       5. If two adjacent sides of a parallelogram are 10 cm and 20 cm and the distance between the shorter sides is 16 cm, calculate the distance (in cm) between the longer sides.   Hint       6. The area of a quadrilateral is 1512 m2. The lengths of the perpendiculars from the opposite vertices to a diagonal are 14.6 m and 12.4 m respectively. What is the length (in m) of this diagonal?   Hint       7. If the area of a parellelogram is 588 m2, find its height (in m) given that its height is thrice its base.   Hint