If the hexagon is regular and you know the side length (s): (A = frac{3sqrt{3}}{2}s^2)
If the hexagon is regular and you know the apothem (a) and perimeter (P): (A = frac{1}{2}aP)
If the hexagon is regular and you know the radius (r) of the circumcircle: (A = frac{3sqrt{3}}{2}r^2)
If the hexagon is irregular, divide it into triangles
Find the area of each triangle
Add all triangle areas together
If coordinates of vertices are given, use the polygon area formula
Use (A = frac{1}{2}left|sum (x_i y_{i+1} – y_i x_{i+1})right|) for coordinate points
Check that all measurements use the same units
Express the final area in square units