How to determine the centre of gravity of a body of an irregular shape?

The centre of gravity of irregular shape can be determined by the following method.
Suspend the body from some point such as A.

Draw the vertical line AA1. It passes through centre of gravity.

Similarly, draw vertical lines BB1 and CC1 by suspending the body from some other points B and C, etc. The point of intersection G of these verticals gives us the position of centre of gravity of the irregular shape.