Simple Solutions

How to Find Square Layout Lines

By: Joe Truini

If laying out square lines is part of your next home improvement project, here’s a great way to do it using the Pythagorean theorem (A² + B² = C²) to form a right angle triangle with 3′ and 4′ sides and a diagonal of 5′:

  1. Establish a 4′ line parallel to a wall.
  2. Measure out 3′ from one end of the 4′ line roughly perpendicular to it.
  3. Hold a tape measure on the other end of the 4′ line.
  4. Measure 5′ so it forms a triangle with the end of the 3′ line.
  5. Adjust the angle of the 3′ line until the tape measure aligns with it.

Print  



Comments

Please Leave a Comment

2 Comments on “How to Find Square Layout Lines”

You can follow comments to this article by subscribing to the RSS news feed with your favorite feed reader.

  • Official Comment:


    Lindsay Hughes Says:
    June 15th, 2016 at 10:39 am

    Jonas, 5 is correct. Take the square root of 25 to find the hypotenuse.

    a²+b²=c²
    3²+4²=c²
    9+16=c²
    25=c²
    √25=√c
    5=c



  • jonas Says:
    June 14th, 2016 at 9:26 am

    I know this must be an oversight, but the theory is (axa)+(bxb) = (cxc)
    (can’t squared easily on keyboard)
    so 3×3+4×4=5×5
    not 3+4=5
    so 9+16=25
    3+4=7
    thanks


We want to hear from you! In addition to posting comments on articles and videos, you can also send your comments and questions to us on our contact page or at (800) 946-4420. While we can't answer them all, we may use your question on our Today's Homeowner radio or TV show, or online at todayshomeowner.com.