Work: First you split the shape into a rectangle and a triangle. So now you have a triangle with the sides 4 x 3.6 and a triangle with the sides 4 x 2.7.
Side note: 2.7 comes from subtracting 3.6 off of 6.3.
Rectangle: A = lw A = 4 (3.6) A = 14.4m²
Triangle: A = 1/2lw A = 1/2 (4) (2.7) A = 5.4m²
Then you add the areas of both the rectangle and the triangle together.