A decagon is a 10 sided polygon
Exterior angles add up to 360 degrees
Interior angles add up to 1440 degrees
It has 35 diagonal
A decagon can have a regular or an irregular shape
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Its not a do-decagon its a dodecahedran!!
There are 1440 degrees in a decagon.
A decagon has 10 sides.
There are 8 triangles in a decagon
A decagon has 10 sides