Texas Instruments TI-89 User Manual page 51

Measuring Objects
Measuring an Angle
Hint: If an angle mark is
displayed on the angle,
select the angle mark to
measure the angle.
Measuring the Slope
of a Linear Object
TI-89 / TI-92 Plus / Voyage™ 200 PLT Cabri Geometry App
(continued)
The tool measures an angle defined by three selected points or
Angle
an angle mark. The second point selected is the vertex of the angle.
The result is displayed in degrees or radians consistent with the
option in the
Angle Geometry Format
1. Create two segments that have a
common point, or any polygon.
2. Press
2ˆ
TI-89:
TI-92 Plus / Voyage™ 200 PLT:
and select .
3:Angle
3. Select three points to specify the
angle. The second point that you
select is the vertex.
The tool measures the slope of a selected segment, ray, vector,
Slope
or line.
1. Create any linear object.
2. Press
2ˆ
TI-89:
TI-92 Plus / Voyage 200 PLT:
and select .
4:Slope
3. Select the segment, ray, vector, or
line whose slope you want to
measure.
dialog box.
ˆ
Select three points.
The result is displayed.
ˆ
Select an object.
The result is displayed.
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