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  2. Triacontagon - Wikipedia

    en.wikipedia.org/wiki/Triacontagon

    One interior angle in a regular triacontagon is 168 degrees, meaning that one exterior angle would be 12°. The triacontagon is the largest regular polygon whose interior angle is the sum of the interior angles of smaller polygons: 168° is the sum of the interior angles of the equilateral triangle (60°) and the regular pentagon (108°).

  3. Icositetragon - Wikipedia

    en.wikipedia.org/wiki/Icositetragon

    In geometry, an icositetragon (or icosikaitetragon) or 24-gon is a twenty-four-sided polygon. The sum of any icositetragon's interior angles is 3960 degrees. The sum of any icositetragon's interior angles is 3960 degrees.

  4. Regular polygon - Wikipedia

    en.wikipedia.org/wiki/Regular_polygon

    For a regular convex n-gon, each interior angle has a measure of: ... 30 40 50 Image Rhombs 3 6 10 15 21 28 36 45 66 105 190 300 Area.

  5. List of polygons - Wikipedia

    en.wikipedia.org/wiki/List_of_polygons

    A pentagon is a five-sided polygon. A regular pentagon has 5 equal edges and 5 equal angles. In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain.

  6. Internal and external angles - Wikipedia

    en.wikipedia.org/wiki/Internal_and_external_angles

    The interior angle concept can be extended in a consistent way to crossed polygons such as star polygons by using the concept of directed angles.In general, the interior angle sum in degrees of any closed polygon, including crossed (self-intersecting) ones, is then given by 180(n–2k)°, where n is the number of vertices, and the strictly positive integer k is the number of total (360 ...

  7. Polygon - Wikipedia

    en.wikipedia.org/wiki/Polygon

    Exterior angle – The exterior angle is the supplementary angle to the interior angle. Tracing around a convex n-gon, the angle "turned" at a corner is the exterior or external angle. Tracing all the way around the polygon makes one full turn, so the sum of the exterior angles must be 360°. This argument can be generalized to concave simple ...

  8. Tridecagon - Wikipedia

    en.wikipedia.org/wiki/Tridecagon

    However, it is constructible using neusis, or an angle trisector. The following is an animation from a neusis construction of a regular tridecagon with radius of circumcircle O A ¯ = 12 , {\displaystyle {\overline {OA}}=12,} according to Andrew M. Gleason , [ 1 ] based on the angle trisection by means of the Tomahawk (light blue).

  9. Dodecagon - Wikipedia

    en.wikipedia.org/wiki/Dodecagon

    The internal angle at each vertex of a regular dodecagon is 150°. ... (a 2m-gon whose opposite sides are parallel and of equal ... 6 wide 30° rhombs and 6 narrow 15 ...