SOLUTION: Find the area of a regular pentagon with an apothem length of 6cm. PLEASE HELP!

Algebra ->  Surface-area -> SOLUTION: Find the area of a regular pentagon with an apothem length of 6cm. PLEASE HELP!      Log On


   

Question 417261: Find the area of a regular pentagon with an apothem length of 6cm. PLEASE HELP!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Take a look at the picture below



Note: the apothem is the length 'a' (in blue)


Notice how there are essentially 10 triangles that make up that pentagon.


So all you need to do is compute the area of one triangle, and then multiply it by 10.


If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim