3/19/12 Aim ; How do we find the are of a regular polygon

How do we find the are of a regular polygon?

Regular polygon conjecture
- The area of a regular polygon is given by the formula 1/2nas
- 'n' represent the number of sides , 'a' represents the apothem or could also be radius if applied to circles and 's' represents the side
- you can also use 1/2PA , 'P' represents the perimeter,'A' represents the area
Examples: 

Example question:

If  the apothem or 'a' = 6 , 's' = 12 and it has 8 sides ( octogon) what is the area?


















                                                              Citations
Wiley, John Sizing up the area of a polygon, Dummies.com , http://www.dummies.com/how-to/content/sizing-up-the-area-of-a-polygon.html

Regular polygons , Icoachmath.com , http://www.icoachmath.com/math_dictionary/Regular_Polygon.html