INSTRUCTIONS: Determine what is being asked by showing complete and neat solution. If in a certain problem an answer Calculated values should not be rounded off. Enclose all nal answers being asked by each item. Include the unit, if any, as part of your nal answer. 2. Final answers must be enclosed in a rectangle. The fallawing format {11' answers are enumerated below. \f3. The sum of the lengths of the two diagonals of a parallelogram is 18 m. One diagonal is 2 meters longer than the other. The area of the parallelogram is 20 square mem- if the shorter diagonal is increased by 10 cm and the longer agonal is decreased by 15 cm, what must be the approximate increase or decrease of the acute angle (degrees) between the diagonals so that the approximate change in area will not exceed 4 square meters? Use differentials. Change in K=