Polygons
Chapter Name : Understanding Quadrilateral |
Sub Topic Code : 104_08_03_02_04 |
Topic Name : Polygons |
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Sub Topic Name : Regular And Irregular Polygons |
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Introduction
Square is a regular polygon with equal sides and equal angles. In general, any polygon with equal side lengths and having equal angles between adjacent sides are called Regular Polygons; otherwise, they are called Irregular Polygons.
Pre-Requisites:
Basic knowledge about polygons
Activity:
A regular polygon has equal sides and angles. An irregular polygon have any side and any angle.
Real Life Question:
Why are the lies at home either rectangle or square but never a random quadrilateral?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Irregular Polygon | Polygon with any side length and any angle |
| Regular Polygon | Polygon with equal sides and equal angles |
| Polygon | A simple closed curve classified according to number of sides and vertices |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Scissors, paper, sketches, ruler, protractor | Polygons are drawn on the paper as plane surfaces increasing one vertex and a side at a time. Different shapes are formed. Use ruler to measure the sides and protractor to measure the interior angles. |
Real life uses :
Computer screens, TV screens, black boards, construction sites, fields
Practical examples around us
| Examples | Explainations |
|---|---|
| Computer monitors | The screen is a convex polygon. It is equiangular in all cases. |
| Black boards | They are convex polygons. they are equiangular and some might even be equilateral depending on shape |
What you learn in Theory:
An Intro into regular and irregular polygons.
What you learn in Practice:
Depending on the length and angles measured, they are divided into equiangular and equilateral polygons. The properties of regular polygons play important role on advanced geometry problems.