Answer:
146 m²
Explanation:
Divide the figure into a triangle and 2 rectangles (see attached diagram)
Formulae
- Area of a triangle = 1/2 x base x height
- Area of a rectangle = width x length
Triangle 1
⇒ area = 1/2 x 16 x (6 + 9 - 4 - 4)
 = 1/2 x 16 x 7
 = 56 m²
Rectangle 2
⇒ area = 3 x (6 + 9)
 = 3 x 15
 = 45 m²
Rectangle 3
⇒ area = 5 x 9
 = 45 m²
Total area
⇒ Total area = triangle 1 + rectangle 2 + rectangle 3
 = 56 + 45 + 45
 = 146 m²