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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.

Calculating areas of closed entities

You can find the area of any closed entity. In addition, the program calculates either the

circumference or the perimeter of the entity, depending on the type of entity you select.

Calculating combined areas

You can find the total area of several combined regions by specifying points or by

selecting entities. You can also subtract the areas of entities or polygons from a

running total.

Viewing calculated area details

As you select entities, the program displays the calculations. If the command bar is

displayed, the information appears there. If the command bar is not displayed, the

program opens the Prompt History window and displays the calculations. The following

type of information is an example of what is displayed:

Entity • Add • Subtract • <First point>: Choose Add Areas Together

Adding: Entity • Subtract • <First point>: Choose Add Entities to Area

Adding area: <Select entities>: Select the first entity

Area = 64.6259, Perimeter = 33.3049

Total length = 33.3049

Total area = 64.6259

Adding area: <Select entities>: press Enter

Adding: Entity • Subtract • <First point>: Choose Subtract Areas

Subtracting: Entity • Add • <First point>: Choose Subtract Entities from

Area

Subtracting area: <Select entities>: Select the first entity to subtract

Area = 3.1597, Circumference = 6.3012

Total length = 27.0036

Total area = 61.4662

Subtracting area: <Select entities>: Select the second entity to subtract

Area = 3.1597, Circumference = 6.3012

Total length = 20.7024

Total area = 58.3066

Subtracting area: <Select entities>: Press Enter

Subtracting: Entity • Add • <First point>: Choose Done