en.wikipedia.org/wiki/List_of_polygons

Systematic polygon names. To construct the name of a polygon with more than 20 and fewer than 100 edges, combine the prefixes as follows. The "kai" connector is not included by some authors. Tens and Ones final suffix -kai- 1 -hena- -gon 20: icosi- (icosa- when alone) 2-di- 30: triaconta-3-tri- 40: tetraconta- 4-tetra- 50:

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Polygon Names; Venture beyond the Octagon! Typically we all know the polygon names up to Hexagon or perhaps Octagon, but what comes next? Is there actually a name for a 27 sided pentagon? Yes there is. The simple version (and the one most people use) is 27-gon. But where is the tounge twisting fun in that?

study.com/academy/lesson/names-of-polygons.html

What Are Polygons? A polygon is a many-sided two-dimensional figure. The word polygon comes from two Greek words. 'Poly' means 'many' and 'gon' means 'angles.' Many of the names of the polygons ...

tutors.com/math-tutors/geometry-help/types-of-polygons

Is It A Polygon? The interiors of all polygons can be broken up into triangles, which is a handy way to find the sum of their interior angles. Take two less than the number of sides, n, and multiply times 180°: (n - 2) x 180°. A circle is not a polygon, but a icosikaihenagon is a polygon. An icosikaihenagon is a 21-sided polygon.

www.infoplease.com/math-science/mathematics/numbers-formulas/polygons-how-many...

A geometrical figure with three or more sides is called a polygon or a polyhedron. Here are the names for some polygons.

www.math.com/school/subject3/lessons/S3U2L1DP.html

A regular polygon is a polygon with all angles and all sides congruent, or equal. Here are some regular polygons. We can use a formula to find the sum of the interior angles of any polygon. In this formula, the letter n stands for the number of sides, or angles, that the polygon has. sum of angles = (n – 2)180°

byjus.com/maths/polygon

A polygon is a two-dimensional geometric figure that has a finite number of sides. The sides of a polygon are made of straight line segments connected to each other end to end. The line segments of a polygon are called sides or edges. The point where two line segments meet is called vertex or corners, henceforth an angle is formed.

learn.desmos.com/graphing-polygons

Use polygons to create beautiful, dynamic shapes in the Desmos graphing calculator. Get started with the video on the right, then check out the example graph from the video as well as challenges below. Polygons in Action "The best way to learn is to do." – Paul Halmos .

www.mathsisfun.com/geometry/polygons-interactive.html

Interactive Polygons. Play with a polygon! Try adding or subtracting points. See different polygons from triangles up. See the lengths, angles and coordinates, too. Note: due to computer rounding errors the last digit is not always correct. Edit. Use the "Edit" button to manually edit the coordinates, or to enter new coordinates of your own.

www.math-play.com/polygon-or-not/polygon-or-not.html

Polygon or Not? This Is the Question : In this game, students will quickly decide whether a geometrical figure is a polygon or not a polygon. Definition. A polygon is a closed figure, formed by segments, and its sides do not cross. Examples: mples. The following figures are polygons.