(NOTE: I hope this is not for legal reasons. if if it is, then don't quote me on this)
if there are 2 right angles (as said in comments, then you can divide the shape into a rectangle and a triangle as sseen in the attachment (not to scale)
we can do this since there are 2 right angles in the places mentioned in the comments (NE and NW
then find the areas of each
(the right angles. are in yellow ink)
area of rectangle=legntht times widht
legnth=120
width=66.1
area=120 times 66.1=7932
find the area of the triangle so we see that we can find the height of the triangle by subtracting 66.1 from 133.78 to find the triangle's height
height=67.68
legnth is the same
area of triangle=1/2 times base times height
base=legnth=120
height=67.68
area=1/2 times 120 times 67.68=4060.8
now add the areas together
rectangle=7932 ft^2 or square feet
triangle=4060.8 ft^2
rectangle+triangle=whole=7932+4060.8=11992.8 ft^2
answer is 11,992.8 ft^2 or 11,992.8 square feet
