A hexagon has two congruent sides that
1 answer:
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There are 13 angles.
We know that
and 
(11 angles)
1.
(9 angles)
2.
(8 angles)
3.
(7 angles)
4.
(6 angles)
5.
(5 angles)
6.
(4 angles)
7.
so we have a parallelogram.
(3 angles)
(2 angles)
8.
(1 angle)
9.
We know that
1.
(9 angles)
2.
(8 angles)
3.
(7 angles)
4.
(6 angles)
5.
(5 angles)
6.
(4 angles)
7.
(3 angles)
(2 angles)
8.
(1 angle)
9.