by **Dirtman** » Sun Nov 19, 2006 10:38 am

Divide the property parcel into two triangles. Calculate the area for each using Heron's formula and add the two together. Divide the answer by 43,560 to obtain acres.

To determine the length of the diagonal line, you need the angle of at least one property corner (and which corner). Use trig to calculate the diagonal measurement to divide the property into two triangles.

If you don't know one of the angles, on the survey plot are lengths and bearings of each property line. These are the compass directions, usually stated in quadrants, e.g., 640.00' N12Âº31'22"E. Using these bearings, you can calculate the angle(s).

George