1-14 Chapter 1: Learning the Basics
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Constructing Objects
(Continued)
3.
Independent objects:
Move the
!
near a side of the triangle (the cursor
changes to the
$
with the message
This triangle
).
Press and hold down the mouse button.
The cursor changes to the
&
and then almost
immediately to the
%
.
Continue to hold down the mouse and move the triangle
about the drawing window.
The triangle does not change its size or its shape, while
the perpendicular bisector moves along with the triangle.
The triangle was constructed using three basic points as
its vertices; therefore, it is an
independent object
and
can be moved.
4.
Dependent objects:
Move the
!
near the perpendicular bisector (the cursor
changes to the
$
with the message
This
line
).
Press and hold down the mouse button.
The cursor changes to the
&
and then almost
immediately back to the
!
.
The perpendicular bisector cannot be modified directly;
it is a dependent object.
Note
: You can modify the perpendicular bisector
indirectly by dragging the basic points or the
independent objects used for its creation.
Example 4: Creating the circumcenter of a triangle
1.
Construct the perpendicular bisector of one side of a
triangle (see Example 2.)
2.
Construct the perpendicular bisector of a second side.
This line
