July 21st, 2012, 12:12 AM  #1 
Senior Member Joined: Apr 2012 Posts: 799 Thanks: 1  find area
[attachment=0:1p8raamh]semicicle.jpg[/attachment:1p8raamh]

July 21st, 2012, 12:51 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,975 Thanks: 1157 Math Focus: Elementary mathematics and beyond  Re: find area 
July 21st, 2012, 01:17 AM  #3 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 522 Math Focus: Calculus/ODEs  Re: find area
[attachment=0:3qj7s5n3]semicicle.jpg[/attachment:3qj7s5n3] The triangle is equilateral, hence the area of the circular sector, minus that of the triangle is: Now, subtract this from the area of the smaller semicircle: 

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