
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
October 13th, 2009, 07:52 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, 08:12 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, 08:43 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, 06:09 AM  #4  
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: Finding the area of a square with right angle lines Quote:
 

Tags 
angle, area, finding, lines, square 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Calculate the acute angle between the lines with equations  bigwave  Algebra  2  August 24th, 2013 04:59 PM 
Formula for Angle between 2 lines  min0rinmath  Algebra  1  November 25th, 2011 02:15 PM 
Area of square with convex parts  area of circle  gus  Algebra  1  April 17th, 2011 05:25 PM 
getting area between two lines  mathsiseverything  Algebra  5  April 15th, 2008 06:27 AM 
area of eq. triangle vs. area of square  captainglyde  Algebra  1  February 19th, 2008 09:55 AM 