Redefining Object Definitions - Texas Instruments TI-89 User Manual

Redefining Object Definitions

Redefining the
Definition of an
Object
Note: The new definition
cannot be a circular
reference. A circular
reference occurs when a
point that defines an object
is redefined to be on that
object. For example,
defining the center point of a
circle to be a point on the
circle is not allowed.
TI-89 / TI-92 Plus / Voyage™ 200 PLT Cabri Geometry App
The toolbar menu contains the
Construction
tool, which redefines the definition of objects.
The Redefine Object tool modifies the current definition of a point.
To redefine a point in the following construction:
1. Create a segment and circle as shown
in this example.
2. Press † and select
B:Redefine Object
3. Move the pointer to a point then
press ¸.
A pop-up menu opens to let you
select a point redefinition option.
¦
– Redefines the point as a
Point
basic point at the same location.
¦
– Redefines the
Point on Object
point to be on an object.
¦
– Redefines the
Intersection Point
point to be at the intersection of
two objects.
¦
Transfer to another point
the point to another existing
point.
4. Select
2:Point on Object
5. Move the pointer to an object
compatible with the selected option,
and press ¸.
The point is redefined.
Redefine Object
.
Select the endpoint of the
segment.
– Transfers
.
Select a point on the circle.
The segment is attached to
the circle.
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