Area of Polygon by Drawing

Can you draw your polygon? Maybe you know the coordinates, or lengths and angles,
either way this can give you a good estimate of the Area.
Note: due to computer rounding errors the last digit is not always correct.


Use the "Edit" button to manually edit the coordinates, or to enter new coordinates of your own.

What is Regular, Concave, Complex?

polygon types

When all angles are equal and all sides are equal it is regular, otherwise it is irregular

When any internal angle is greater than 180° (it points inwards) it is concave. (Think: concave has a "cave" in it), otherwise it is convex.

When the boundary crosses over (so the polygon intersects itself) it is complex, otherwise it is simple like most polygons we deal with. Many rules about polygons don't work when they are complex.