try square(redirected from try squares)
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try square[′trī ‚skwer]
An instrument consisting of two straightedges secured at right angles to each other, used for laying off right angles and testing whether work is square.
square whose legs are fixed at 90°; serves as a guide for marking lines at right angles to an edge or surface, as a scale for laying out work, and as a tool for testing the straightness and/or squareness of edges, faces, etc.A