Explanation:
so now we are going to find the area of larger figure and subctract the rectangle from the figure
Area of triangle = 1/2 bh
= 1/2 (12) (12)
= 72 m2
Area of rectangle = L× W
= 3 × 9
=27 m2
Area of the figure= (72-27) m2
=45m2
so the figure has area of shaded region 45m2