Posted by Angie on Thursday, April 30, 2009 at 9:58pm.
The sides of a square are all increased by 3 cm. The area of the new square s 64 cm^2. How can you find the length of a side of the original square?

Math  Walker, Thursday, April 30, 2009 at 10:04pm
Since the formula for the a\area of a square is "Area=(side)^2", all the sides are equal. So just substitute in.
s^2=64
s=sqrootof64
side=8
83=5
so the original side length is 5 cm.

Math  Ms. Sue, Thursday, April 30, 2009 at 10:05pm
The area of a square is the two sides multiplied together.
Since all sides of a square are the same, you need to find the square root of 64.
When you find that, subtract 3 cm from it to answer your question.

Math  Angie, Friday, May 1, 2009 at 8:09pm
the ways above is probably easier, but my teacher probably wants me to solve it by factoring..
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