+0  
 
0
937
2
avatar

Find the area of the regular 30 -gon with radius 7 mm.

 Apr 4, 2017
 #1
avatar+17747 
+1

A formula to find the area of a regular polygon given the radius is:

Area  =  r2 · n · sin( 360 / n ) / 2

          =  7· 30 · sin( 360 / 30 ) / 2

          =  7· 30 · sin( 12 ) / 2

          =  5.09 mm2     (approximately)

 Apr 5, 2017
 #2
avatar+96201 
+1

The area  is given by :

 

30 * (1/2) * (7^2) * sin (12°)  ≈   152.8 mm^2  

 

[ I think geno's answer would be the same.....]

 

 

cool cool cool

 Apr 5, 2017

12 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.