MOMENT allows you to calculate the polar moment of inertia
of a selected closed region, with respect to a selected
axis normal to the screen.

Indicate the configurations available for MOMENT analysis 
by choosing from the following options:

CIRCLE - to select an arc or circle for calculation.

CLSD LN - to select a set of line entities whose
projections define a closed region in the current view.

GENERAL - to choose a set of entities (excluding points)
whose projections define a closed region in the current
view.

Unlike the CIRCLE and CLSD LN options, the GENERAL option
calculates the components of the polar moment with respect
to orthogonal axes through the polar position and displays
them along with the polar moment. These axes are parallel 
to the x and y axes of the display.
