Interior angles: 3240 degrees
Exterior angles: 360 degrees
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3240 degrees
The sum of interior angle ( Sum-of-interior-angles-n-gon) of n-gon is:If we have a ,Then
Enneacontagon
the sum of the interior angles of a convex 45-gon is 7740.
11- undecagon 12- dodecagon 13- 13-gon 14- 14-gon 15- 15-gon 16- 16-gon 17- 17-gon 18- 18-gon 19- 19-gon 20- 20-gon