Art, Music, and Creative Writing homework help. ##45## sides
A regular polygon with ##n## sides has a total of ##(n-2)180^o## internal degrees. This can be understood as the number of triangles in which the polygon can be decomposed.
A regular polygon with an interior angle of ##172^o## has a total of
##n 172^o##. So we have
##n 172 = (n-2)180##. Solving for ##n## we have ##n = 45##
