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Calculating areas

You can calculate the area and perimeter of a polygon based on a series of points you specify or enclose with a circle or closed polyline. You can also determine the area of several combined entities and add or subtract the area of one or more entities from a total combined area.

Calculating areas defined by points

You can find the area and perimeter of any closed region by specifying a series of points. The program calculates the area and perimeter of the space that is enclosed by an imaginary polygon consisting of straight-line segments connecting each point.

To calculate the area defined by points you specify

  1. Do one of the following:
    • Choose Tools > Inquiry > Area.
    • On the Inquiry toolbar, click the Area tool ().
    • Type area and then press Enter.
  2. Specify the first point.
  3. Specify the second point.
  4. Continue specifying points in sequence to define the perimeter of the area you want to measure.
  5. As you select each successive point, the resulting polygon is displayed on the screen.
  6. To complete the calculation, press Enter.
  7. The area and perimeter of the region you defined are displayed. For example, the following type of information is displayed:

Area = 11.0583, Perimeter = 15.3092


Select the points (A, B, C) that form a polygon. The area and perimeter of the region are then calculated.

Calculating areas of closed entities

Calculating combined areas

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