This lesson provides the basics of squaring in construction. Learn about Plumb and Level, the 345 triangle, and equal diagonals - all methods of determining if something is square. A needed skill in Wall Framing and all types of construction.

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0:00 What is square?
1:45 Tools for squaring
4:35 Pythagorean theorem and 345 triangles
10:30 Squaring using equal diagonals