



 
Steve, Unfortunately there isn't enough information here to find the area of your lot. Besides the lengths of the sides I need some information on the shape of the lot. If you can tell me the angle at one of the corners or the length of one of the diagonals then I can find the area. Harley Steve wrote back.
Using your description I drew a rough diagram (not to scale). You didn't give me units so I am going to assume they are feet. I labeled the corners so that I can refer to them. The angle at B is a right angle so I can find the area of the triangle AC using the fact that the area of a triangle is half the base times the height. Thus I get
Again since triangle ABC is a right triangle I can use Pythagoras theorem to find the length of AC.
Now that I have the lengths of all three sides of triangle ACD I can find its area using Heron's formula. I got
Thus the area of your lot is
There are 43560 square feet in an acre so the area of your lot is
Harley
 


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