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Secondary Magazine - Issue 30: Focus on


This page has been archived. The content was correct at the time of original publication, but is no longer updated.
Created on 19 March 2009 by ncetm_administrator
Updated on 27 April 2009 by ncetm_administrator

Secondary Magazine Issue 30
 

Focus on...polygons

In geometry, a polygon is traditionally a plane figure that is bounded by a closed path or circuit, composed of a finite sequence of straight line segments (ie by a closed polygonal chain). These segments are called its edges or sides, and the points where two edges meet are the polygon's vertices or corners. The interior of the polygon is sometimes called its body. A polygon is a 2-dimensional example of the more general polytope in any number of dimensions. (Wikipedia).
 

Download the Polygon ITP from the National Strategies.
 

Go to the polygon playground to use their interactive polygon tool.
 
Use the interactive tools at the MathsNet website to get to know polygons in more detail.
 
What is a polygon? Well, a dead parrot of course!
 

Polygons

A regular polygon is an n-sided polygon in which the sides are all the same length and are symmetrically placed about a common centre (ie, the polygon is both equiangular and equilateral). Only certain regular polygons are "constructible’ using the classical Greek tools of the compass and straight edge.

The terms equilateral triangle and square refer to the regular 3- and 4-polygons, respectively. The words for polygons with n≥5 sides (eg, pentagon, hexagon, heptagon, etc.) can refer to either regular or non-regular polygons, although the terms generally refer to regular polygons in the absence of specific wording (Wolfram).
 

 
 
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