As appeared in PSLE 2010 exam:In the figure below, AB=7 cm, BC=9 cm, CD=3 cm and DA=11 cm. Angle ABC and Angle CDA are right angles.Find the area of the figure ABCD.ABCD is a 4-sided figure with base AD from left to right and is 11 cm. From A,it is joined to B and AB is 7 cm. From B, it is joined to C and BC is 9 cm. From C, it is joined to D and CD is 3 cm.