TI-89 / TI-92 Plus / Voyage™ 200 PLT Cabri Geometry App 9
To illustrate the basic steps in this section, the following procedure
will construct and measure a circle circumscribed around a triangle.
1.
Press
TI-89:
2Š
TI-92 Plus / Voyage™ 200 PLT:
Š
and
select
3:New
.
2.
Type a name for the variable to start a
new construction and press
¸
twice.
Start a new construction.
3.
Construct and label a triangle.
(Perform steps 1 through 4 in
“Labeling Points and Objects”
described on page 7.)
Construct and label a triangle.
4.
Construct perpendicular bisectors for
two sides of the triangle by pressing
†
and selecting
4:Perpendicular
Bisector
.
5.
Select side
AB
and press
¸
.
Construct the first
perpendicular bisector.
6.
Select side
BC
and press
¸
.
Complete the perpendicular
bisectors.
7.
Modify the appearance of the
perpendicular bisectors from solid to
dotted lines by pressing
TI-89:
2‰
TI-92 Plus / Voyage 200 PLT:
‰
and
select
9:Dotted
.
8.
Select a line and press
¸
.
Modify the lines.
Learning the Basics
(continued)
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