Hello, sonia1!
There is another approach . . . It requires Trig . . .
Determine how many acres there would be in a triangular lake,
surrounded by square plots of 370, 116 and 74 acres.Use the Law of Cosines to find angleCode:* * * ___ * * __ √116 * * √74 * * * * A * * * * * * √370
. .
Hence: .
Then the area of the triangle is given by:
. .