use the formula that says sum of the interior angles is (11-2)180 degrees or 180x9
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what is the total of interior angles of the nonagon
the total interior angles in a trapezium is 360 degrees!
what is the total of interior angles in a nonagon?
All triangles have a total of 180 degrees for interior angles in Euclidean plane geometry
Total interior angles 1620o. If all angles are equal they are 147.2727 recurring degrees