a decagon
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A decagon.
A polygon has as many angles as sides, so a polygon with 10 sides (decagon) would have 10 angles.
A decagon has 10 sides. It also have 10 angles.
A polygon is a closed figure of three or more sides. A regular polygon is a figure with straight sides, each side of equal length and all internal angles equal to each other. 3 sides = triangle 4 sides = square 5 sides = pentagon 6 sides = hexagon 7 sides = heptagon 8 sides = octagon 9 sides = nonagon 10 sides = decagon
decagon