SOLUTION: 6. How many diagonals does a decagon have?

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Question 255097: 6. How many diagonals does a decagon have?
Answer by derbyman4025(7) About Me  (Show Source):
You can put this solution on YOUR website!
A decagon has 35 diagonals.
Other Info:
A Nonagon has 27 diagonals. An Octagon has 20 diagonals. A Heptagon has 14 diagonals. A Hexagon has 9 diagonals
Cheers,
Matt