www.regentsprep.org/regents/math/geometry/gg3/lpoly1.htm

Sum of Interior Angles of a Polygon. = 180(n - 2) (where n = number of sides) ...
Notice that a pentagon has 5 sides, and that 3 triangles were formed by ...

www.mathsisfun.com/geometry/interior-angles-polygons.html

The Interior Angles of a Triangle add up to 180° ... If it is a Regular Polygon (all
sides are equal, all angles are equal) ... Sum of Interior Angles = (n-2) × 180°.

www.khanacademy.org/math/geometry/hs-geo-foundations/hs-geo-polygons/v/sum-of-interior-angles-of-a-polygon

Learn how to find the sum of the interior angles of any polygon. ... Practice:
Finding angle measures 1 · Practice: Finding angle measures 2 · Sum of interior ...

www.geom.uiuc.edu/~dwiggins/conj07.html

Conjecture (Polygon Sum Conjecture): The sum of the interior angles of any
convex n-gon (polygon with n sides) is given by (n-2)*180. Corollary (Angle
Measures for Regular n-gons): The measure of each of the n angles in a regular
n-gon is ...

www.mathopenref.com/polygoninteriorangles.html

... and repeat. Note the behavior of the interior angles and their sum. ... So for a
polygon with N sides, there are N vertices and N interior angles. For a regular ...

www.jmap.org/JMAP/RegentsExamsandQuestions/PDF/WorksheetsByPI-Topic/Geometry/Informal_and_Formal_Proofs/G.G.36.InteriorandExteriorAnglesofPolygons.pdf

the sum of the measures of the interior and exterior angles of polygons. 1 The
sum of the interior angles of a polygon of n sides is. 1) 360. 2)360 n. 3) (n - 2) ∙
180.

www.mathwarehouse.com/geometry/polygon/

What is the sum measure of the interior angles of the polygon (a pentagon) on
the left? ... Formula to find 1 angle of a regular convex polygon of n sides = a.

www.maplesoft.com/support/help/Maple/view.aspx?path=MathApps/SumofInteriorAnglesOfAPolygon

For example, a triangle has three interior angles, with a sum of 180. As the
number of sides, n , of a polygon increases, the sum of its interior angles,...

www.veritasprep.com/blog/2013/06/quarter-wit-quarter-wisdom-regular-polygons-and-the-irregular-ones/

Jun 18, 2013 ... The average of these angles must be equal to the measure of each interior angle
of a regular polygon with n sides since the sum of all angles is ...

www.freemathhelp.com/feliz-interior-polygon.html

Interior angles are those formed by the sides of a polygon that are on the inside
of ... the sum, S, of the degree measures of these x interior sides is given by the ...