Lattice points and area
Trivia
This theorem gives the area of a simple polygon whose vertices all lie on lattice points, using the formula $A = I + \frac{B}{2} - 1$, where $I$ is the number of interior lattice points and $B$ is the number of boundary lattice points. What is this theorem called?
APick's Theorem
BShoelace Theorem
CMinkowski's Theorem
DFarey's Theorem