Question: what is 3 4 5 method?
Answer: The 3-4-5 Method. The 3-4-5 method works as follows for a woodworking project: On one side of a corner, measure 3 inches (or some multiple of 3 inches) from the corner and make a mark. ... Next, measure between the two marks. If the distance is 5 inches (or the appropriate multiple of 5), your corner is square.