# Finding the perimeter and area of polygons

• Jan 12th 2010, 04:34 PM
Morgan82
Finding the perimeter and area of polygons
I need to find the perimeter and area of polygons. I do this by inscribing them in a circle. I need to do this for 3, 6, 9, 12, and 15 sided.
Is there some kind of pattern or relation?
• Jan 12th 2010, 04:40 PM
UC151CPR
Have you tried doing the first few to see if you can see a pattern?
• Jan 12th 2010, 04:45 PM
Morgan82
Quote:

Originally Posted by UC151CPR
Have you tried doing the first few to see if you can see a pattern?

Yes, I did.. but I am not noticing anything.
• Jan 12th 2010, 04:45 PM
skeeter
Quote:

Originally Posted by Morgan82
I need to find the perimeter and area of polygons. I do this by inscribing them in a circle. I need to do this for 3, 6, 9, 12, and 15 sided.
Is there some kind of pattern or relation?

Areas and Perimeters of Regular Polygons
• Jan 12th 2010, 04:46 PM
UC151CPR
What values did you get for area & perimeter for the first few?
• Jan 12th 2010, 04:49 PM
Morgan82
Quote:

Originally Posted by UC151CPR
What values did you get for area & perimeter for the first few?

3-gon-
perimeter= 3sqrt(3)r
Area = (3sqrt(3)r^2)/4

6-gon-
Perimeter = 6r
Area = (3sqrt(3)r^2)/2