What is the purpose of a square in carpentry?

In carpentry, the primary purpose of a square is to check and mark right angles for accurate cuts and joinery. A square is an essential tool, typically a carpenters' square, which has two arms that form a right angle, enabling carpenters to ensure that wood pieces are cut accurately at 90 degrees. This is crucial for constructing frames, corners, and various joints, as any deviation from a right angle can lead to misalignments in the structure, affecting both aesthetics and stability.

While drawing straight lines, measuring lengths, and providing support for structures are important tasks in carpentry, they specifically do not highlight the unique functionality of the square in ensuring precision in right angles, which is fundamental for most carpentry projects. This focus on accuracy in angles is what distinguishes the square as an invaluable part of carpentry tools, directly impacting the quality and durability of the finished work.