Answer:
178ft
Explanation:
Split the shape up into pieces. If you make an invisible cut vertically from the 14 ft length you will realise you have a small triangle attached to a rectangle.
You can assume that the height of the triangle is equal to the 20 - 14 as the left side must equal the right side for this shape thus this invisible length is equal to 6 ft
Area of triangle: (6ft x 6ft)/2 = 18 ft^2
Area of rectangle: 20ft x 8ft = 160 ft^2
Area of total shape = 160 + 18 = 178ft
So you're correct