rotation
angle
(
degrees
)
90
show
original
polygon
show
rotated
polygon
show
arc
of
rotation
show
grid
-
10
-
8
-
6
-
4
-
2
2
4
6
8
10
-
10
-
8
-
6
-
4
-
2
2
4
6
8
10
cos
(
θ
)
-
sin
(
θ
)
sin
(
θ
)
cos
(
θ
)
=
0
.
000
-
1
.
000
1
.
000
0
.
000
