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  • The sum of the measures of the interior angles of a triangle (3-gon) is 180 degrees. The sum of the measures of the interior angles of a convex quadrilateral (4-gon) is 360 degrees. The sum of the measures of the interior angles of a convex pentagon (5-gon) is 540 degrees. What is the sum of the measures of the interior angles of a convex polygon with 23 sides (23-gon)?

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Contest problems and answers provided by:

David Rock
rock_david@colstate.edu
Columbus State University

Doug Brumbaugh
brumbad@pegasus.cc.ucf.edu
University of Central Florida