Answer:
2 sides.
Explanation:
Correct me if I'm wrong but a decogon has 10 sides and an ogtagon has 8 sides so it might be 2.
2 more sides.
Decagon = 10 sides
Octagon = 8 sides
The prefix Octa means 8 sides
example : Octa is in Octapus; and octopus have 8 legs or tentacles.
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