8-3-11

Editing Figures

IFixing a Measurement of a Figure

By “fixing a measurement” we mean that a constraint is placed on the figure. For example, if we fix (constrain) a point to a circle and move the circle, the point will also move.

The following example shows how to fix the size of an angle of a triangle.

STo fix the measure of an angle of a triangle

(1)Draw the triangle.

(2)Select side AB and then select side BC.

(3)Input 90 into the measurement box, and then select the check box to the right of it.

• This fixes the measure of angle B at 90 degrees.

A highlighted check box indicates the measurement is fixed (constrained).

IChanging a Label or Adding a Name to an Element

You can change the name of a point, or add a name to each element as explained in the following example.

SClassPad Operation

(1)Select (highlight) a point. Tap the down arrow to the right of icon palette on measurement box and then U.

This displays the current name of point A in the measurement box. The displayed name is highlighted so it can be edited.

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