Mark Angle - Texas Instruments Cabri Geometry II Manual Book

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Mark Angle

The Mark Angle tool labels an angle specified by three points with an angle mark.

Creating a marked angle

Select Mark Angle from the Display toolbox.

Specify the angle by selecting three points. The second

point must be the vertex.

Note: To measure an angle, just select the marked

angle with the Angle tool in the Measure toolbox.

Modifying an angle mark

Using the Pointer tool, modify an angle mark by dragging it

through the vertex to measure the opposite angle. The

angle mark changes to

Using the Modify Appearance tool in the Draw toolbox, change

the number of angle marks displayed by selecting the

desired angle mark attribute, and then the angle mark.

Example

Mark two angles:

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when the angle is 90 degrees.

Select three points.

Drag the mark through the vertex to

measure the reflex angle.

Chapter 12: Using the Display Toolbox

12-7

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