Answer:
D
Find the area of the smaller triangle first.
Area of smaller triangle = 1/2 x 5 x 12 = 30 cm²
The bigger triangle and rectangle make up a trapezium.
Find the length of trapezium.
28 - 5 = 23 cm
Area of trapezium is given as 1/2 x sum of parallel sides x height.
Area of trapezium = 1/2 x (23+14) x 12 = 222 cm²
Area of trapezoid = 30 + 222 = 252 cm²