Reflection is a
transformation that moves a point
on the plane by
using the properties of the
object and its shadow on a flat mirror.
Reflection by using
program wingeom
1.
Open Program wingeom 2Dim
2.
Make a reflect line. For example AB are
line y = x, there is a triangle at the right line AB.
Look at the picture below:
3.
Click transform > mirror, typing CDE
at vertice, then look at AB display at the box of mirror, click draw. The shadow
of triangle CDE will be come that is C’D’E’
4.
Draw CC’ with click left on your cursor
at the segment mode, then click right on your cursor for make a label f at CC’
and AB. it’s mark reflection properties that the distance of object equals the
distance of mirror to shadow. They are perpendicular between CC’ and the line
of AB.
5.
The triangle of CDE and C’D’E’ are congruent
surely, look different at the naming of
point direction .
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