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There is no such word as a dectagon. And since it could refer to an octagon or a decagon (or possibly something else), it is not possible to give a sensible answer. Please correct your spelling and resubmit the question. Also it would be useful to know how many WHAT?

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There are 10 sides on a decagon

A decagon has 10 sides

A decagon has 10 sides

Decagon has 10 sides, and a Hexagon has 6 sides.

Decagon is 10 sides. Octagon is 8 sides.

A decagon has 10 sides. It also have 10 angles.

A decagon has 10 sides, and a quadrilateral has 4 sides, therefore a decagon has 6 more sides than a quadrilateral.

Its not a do-decagon its a dodecahedran!!

A decagon has 10 sides.

dodecagon* and 12.

A decagon has 10 sides

A regular decagon has 10 equal sides.

A decagon has five more sides.

A nonagon has 9 sides and a decagon has 10 sides

A decagon contains ten sides and ten angles.

10 sides.

It has 10 sides

10 sides

10 sides

A decagon has 10 angles (and sides)

A decagon is a 10 sided polygon

It still has ten sides, same as a normal decagon. "Irregular" simply means that all the sides and angles of the decagon are not congruent.

A decagon has ten sides - from the Greek word 'deka' meaning ten.

A decagon has 10 sides A heptagon has 7 sides Therefore a decagon has 10 - 7 = 3 more sides than a heptagon.

a decagon only has 10 sides so 2 more sides