Finding square on a relatively large project can be a bit difficult, but taking a cue from the construction world can help find a simple solution for finding square in any project.
The 3-4-5 rule is one of the easiest ways to find square, whether you're measuring a bookcase or laying out the corner posts for a new home foundation. By using a variation of the Pythagorean Theorem (remember high school algebra?), you can easily Find Square Using the 3-4-5 Rule on nearly any scale project.
(c) 2012 Chris Baylor, licensed to About.com Inc.
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Comments
I would like to read about the 3-4-5 Rule but the link never takes you to the article??
Link to 345 rule just goes to pocket hole joints.
There was an error in the newsletter. The link to the 3-4-5 rule is http://woodworking.about.com/od/gettingstarted/qt/345Rule.htm
On one side of a corner, measure three inches from the corner and make a mark. On the opposite side of the corner, measure four inches from the corner and make a mark. Next, measure between the two marks. If the distance is five inches, your corner is square!
I never would have thought how much stuff there was on the internet on this! Thank you for making this all simple to get the picture