I get 19,220 square meters which is 1.92 hectares or 4.74 acres
The way I did it was make a rectangle using the sides of 80m x 119m = 9520sqm
Next I worked out the area of the triangle with sides 119m and 163m = 9700sqm
Adding them together gives the 19,220sqm.
The longer bottom side of 112m is what gives the longer triangle hypotenuse of 163m