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October 13th, 2009, 07:52 PM   #1
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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:

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October 13th, 2009, 08:12 PM   #2
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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.
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October 13th, 2009, 08:43 PM   #3
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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?
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October 14th, 2009, 06:09 AM   #4
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Re: Finding the area of a square with right angle lines

Quote:
Originally Posted by vnonwong
I'm sorry, what does "join the diagonal" mean?
Edit: okay so you mean to join the lines "5" and "3" together?
I should have been more clear. The diagonal of the square, top left to bottom right.
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