Thread: geometry help
View Single Post
  #5  
Old May 19th, 2008, 06:05 PM
Mathstud28's Avatar
Mathstud28 Mathstud28 is offline
MHF Contributor
  
Join Date: Mar 2008
Location: Pennsylvania
Posts: 3,664
Country:
Thanks: 430
Thanked 1,058 Times in 959 Posts
Mathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to beholdMathstud28 is a splendid one to behold
Send a message via AIM to Mathstud28
Default
Quote:
Originally Posted by Zyger View Post
I need help solving these math problems, I have no idea how to do them:


the circle one I need the are aof the shaded figure
the p-gram one, i need the area
the pentagon, I need the apothem, area, and side length
A useful formula to know is that

For a regular n-gon of sidelength b

A_{n-gon}=\frac{1}{4}nb^2\cot\bigg(\frac{\pi}{n}\bigg)
Reply With Quote