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​
number of vertices
3
4
5
6
A
B
C
D
E
F
-4
-2
0
2
4
-4
-2
0
2
4
A
1
-4
+
-
B
3
-4
-4
12
C
4
2
6
16
D
3
3
12
-6
E
0
4
12
0
F
-3
1
0
12
A
1
-4
12
-1
totals
38
33
area =
38 + 33
2
=
71
2