www.mathsisfun.com/geometry/polygons.html

Is it a Polygon? Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up) ...

www.mathsisfun.com/shape.html

2D Shapes. Regular Polygons. A polygon is a plane (2D) shape with straight sides. To be a regular polygon all the sides and angles must be the same: ...

en.wikipedia.org/wiki/List_of_polygons

In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight ... Articles with short description · Short description matches Wikida...

en.wikipedia.org/wiki/Polygon

In geometry, a polygon is a plane figure that is described by a finite number of straight line ... Rectilinear: the polygon's sides meet at right angles, i.e., all its interi...

www.ducksters.com/kidsmath/polygons.php

Polygons · Flat - this means it's a plane figure or two-dimensional · Straight lines - these are called segments in geometry · Enclosed - all the lines fi...

www.skillsyouneed.com/num/polygons.html

Three-Sided Polygons: Triangles · Equilateral – all the sides are equal lengths, and all the internal angles are 60°. · Isosceles – has two equal sides, with the th...

www.mathplanet.com/education/geometry/points,-lines,-planes-and-angles/polygons

Polygons. A polygon is a closed figure where the sides are all line segments. Each side must intersect exactly two others sides but only at their endpoints.

www.math.com/school/subject3/lessons/S3U2L1GL.html

Polygons are many-sided figures, with sides that are line segments. Polygons are ... The table lists all the polygons having up to 10 sides. Click the name of each ...

www.math.com/tables/geometry/polygons.htm

Equilateral - all sides are the same length. Convex - a straight line drawn through a convex polygon crosses at most two sides. Every interior angle is less than ...

www.storyofmathematics.com/polygons-definition

A regular polygon is a polygon in which all the interior angles are equal and also all the sides are equal. There are different types of regular polygons. These are: A ...