
Example: In a quadrilateral, the diagonals intersect at right and have lengths equal to 9 cm and 10 cm. respectively. Find the area of the quadrilateral. Solution: Area of quadrilateral = 1/2 * d_{1}d_{2} Given that, d_{1} = 9cm. and d_{2} = 10 cm. Area = 1/2 * 9 * 10 A = 9 * 5 A = 45 Sq. cm. Directions: Solve the following problems. Also write at least ten examples of your own. 