Texas Instruments TI-89 User Manual page 56

Checking Properties of Objects
Determining If Lines
Are Parallel
Tip: Position the text box to
the desired location before
pressing ¸ to display the
result.
Note: The displayed
property changes when the
two segments are no longer
parallel.
Determining If Lines
Are Perpendicular
TI-89 / TI-92 Plus / Voyage™ 200 PLT Cabri Geometry App
(continued)
The tool verifies whether or not two lines, segments, rays,
Parallel
vectors, axes, or sides of a polygon are parallel.
1. Construct two segments as shown.
2. Press
2ˆ
TI-89:
TI-92 Plus / Voyage™ 200 PLT:
select
8:Check Property,
select .
2:Parallel
3. Point to the first segment and press
¸ then point to the second
segment and press ¸.
4. Press ¸ to display the property
of the two segments.
5. Drag the endpoint of one of the
segments a few pixels up or down.
The tool verifies whether or not two lines, segments,
Perpendicular
rays, vectors, axes, or sides of a polygon are perpendicular.
1. Construct two segments as shown.
2. Press
2ˆ
TI-89:
TI-92 Plus / Voyage 200 PLT:
select
8:Check Property,
select 3:Perpendicular .
3. Point to each segment, pressing
¸ each time.
ˆ
and then
Select the objects.
ˆ
and then
Select the objects.
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