You can split this into smaller parts and calculate the area, or use the Shoelace Theorem. Since I can't demonstrate splitting the shape here, I can use the shoelace theorem.
Either way will give you 87/2 .
Thx, Firebolt....here's another way with something known as Pick's Theorem
Lattice points = points with integer coordinates
Area = [ lattice points in the interior of the figure ] + [ lattice points on the boundary / 2 ] - 1
So we have
50 + 16/2 - 1 =
50 + 8 - 1 =