Quadrilateral
vertices are
and
.
Write the vertex matrix for quadrilateral
is
.
Find rotation at
about the origin.
To rotate
about the origin, multiply the vertex matrix by
.
.
Write the vertices of the image.
\ The first row represents the
–coordinates and the second row represents the
–coordinates.
The vertices are
and
.
Graph:
\Plot the points
and
and connect the points to form quadrilateral
.
Plot the points
and
and connect the points to form quadrilateral
.

Observe the graph:
\Quadrilateral
and
are similar, both has same shape and rotate about
the origin.
Coordinates of the vertices of the images are
and
.
Graph of the quadrilateral
and
is
