Calculate the area of the shaded region shown in figure (iii) given below. All measurements are in meters.

If the sides of a square are lengthened by 3 cm, the area becomes 121 cm³. Find the perimeter of the original square.

Find the area of the quadrilateral ABCD shown in figure (ii) given below. All measurements are in centimeters.

Find the area enclosed by the figure (i) given below. All measurements are in centimeters.