Examine quadrilateral ABCD,
A
B
C
D
,
which has vertices A(1,6),
A
(
1
,
6
)
,
B(6,6),
B
(
6
,
6
)
,
C(5,2),
C
(
5
,
2
)
,
and D(0,2).
D
(
0
,
2
)
.

Quadrilateral A B C D in the plane with the given coordinates.