The name of a 12 sided polygon is dodecagon.
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The interior angles of a 12 sided polygon add up to: (12-2)*180 = 1800 degrees
A 10-sided polygon is a decagon. A 12-sided polygon is a dodecagon.
A dodecagon is a 12 sided polygon
360/12 = 30 degrees
Its 12 interior angles add up to 1800 degrees