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October 13th, 2009, 06:52 PM  #1 
Newbie Joined: Oct 2009 Posts: 3 Thanks: 0  Finding the area of a square with right angle lines
I have no idea how to answer this question Find the exact area of the large square below: 
October 13th, 2009, 07:12 PM  #2 
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: Finding the area of a square with right angle lines
Join the diagonal which will divide the length 4 into two parts. Extend the "5" line upwards [in your diagram] a further length "3". Join that point to the top left corner of the square. You now have a right triangle with two sides 8 and 4 and the diagonal of the square. Find the length of the diagonal and the side of the square [and area] from that.

October 13th, 2009, 07:43 PM  #3 
Newbie Joined: Oct 2009 Posts: 3 Thanks: 0  Re: Finding the area of a square with right angle lines
I'm sorry, what does "join the diagonal" mean? Edit: okay so you mean to join the lines "5" and "3" together? 
October 14th, 2009, 05:09 AM  #4  
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: Finding the area of a square with right angle lines Quote:
 

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angle, area, finding, lines, square 
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