Which tool would you use to ensure that two surfaces are perpendicular to each other?

The try square is specifically designed to check and mark right angles, ensuring that two surfaces are perpendicular to each other. Its blade is set at a perfect 90-degree angle to the handle, allowing for precise measurement of corners and edges. When you place the try square against the surfaces being checked, it will indicate whether the surfaces meet at a right angle. This tool is essential in woodworking and metalworking for achieving accurate angles and maintaining squareness in projects.

While other options like the protractor measure angles, they do not facilitate checking for perpendicularity directly. The combination square can also be used for this purpose, but it is more versatile in measuring and marking angles rather than serving solely to check perpendicular surfaces. The framing square is larger and primarily used for layout work in framing, but it achieves the same function as the try square in ensuring right angles. However, when it comes to a focused task of verifying perpendicularity, the try square provides the most straightforward solution.