Type `AREA` or `AA` and press Enter
Choose `Object` and select the closed shape
Read the area in the command line
Or choose `Add` to measure multiple areas together
Or choose `Subtract` to remove an area from another
Use `Properties` after selecting a closed object to see the area
Use `LIST` to view the area of a selected object
Ensure the boundary is closed for accurate results
Use `BOUNDARY` if you need to create a closed polyline first