A linear dimension measures the length of a line or the distance between two points or elements. You can place linear dimensions with the Distance Between and SmartDimension commands.

An angular dimension measures the angle of a line, the sweep angle of an arc, or the angle between two or more lines or points. You can place angular dimensions with the Angle Between and SmartDimension commands.

A radial dimension measures the radius of elements, such as arcs, circles, ellipses, or curves. You can place a radial dimension with the SmartDimension command.

A diameter dimension measures the diameter of elements, such as circles and ellipses. You can place a diameter dimension with the SmartDimension command.

The components of a dimension are as follows:

(A) |
Projection line |
(E) |
Break line |

(B) |
Dimension line |
(F) |
Symbol |

(C) |
Dimensional value |
(G) |
Connect line |

(D) |
Terminator |