The Measure menu

Using Sketchpad, you can measure various lengths, angles, etc. Here are a few options you may use in the Measure menu.

• Length -- Select a line segment. This option measures its length.

• Distance -- Select two points. This option measures the distance between the two.

• Perimeter -- Select a shape. This option measures the length of its perimeter.

• Circumference -- Select a circle. This option measures its circumference.

• Angle -- Select three points. This option measures the angle they define.

• Area -- Select a filled-in shape. This option measures its area.

• Radius -- Select a circle. This option measures its area.

And, of course, the most important menu option of all ...the ``Undo" option. If you mess something up, choose ``Undo" from the Edit menu.