The vertices are
and
.
Find the line joining the points
.
The line equation is
.
Substitute
and
in the line equation.

Find the line joining the points are
.
Substitute
and
in the line equation.

Graph:
\Plot the points and join the points using a line segment.
\Shade the region enclosed by the segments.
\
Line joining the points are
.
Substitute
and
in the above line equation.

Line joining the points are
.
Substitute
and
in the above line equation.

Find the area.
\ 
Power rule of integral:
.


.
.