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Q: How many interior angles in a 9 sided shape?

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A 6 sided shape (hexagon) would have 6 interior angles of 120 degrees (assuming it is regular)

The interior angles of an 11 sided polygon add up to 1620 degrees

The interior angles in a quadrilateral (4 sided shape) add up to 360 degrees.

The formula is: (n-2)*180 = sum of interior angles

Assuming it is a two dimensional shape, 12 sides implies 12 angles (interior or exterior).

The 4 interior angles of a quadrilateral add up to 360 degrees

(number of sides -2)*180 = sum of interior angles

Exterior angles add up to 360 degrees Interior angles add up to 540 degrees

52 angles.

An undecagon is an 11 sided shape and its interior angles add up to 1620 degrees

A dodecagon is a 12 sided shape that has 12 interior angles that add up to 1800 degrees and 12 exterior angles that add up to 360 degrees

8 because there are 180 degrees in a triangle and 8*180 = 1440 degrees The interior angles of a 10 sided shape add up to 1440 degrees

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