What role does a square play in carpentry?

A square is an essential tool in carpentry primarily used to mark angles and ensure that surfaces are square, which means they are at precise right angles (90 degrees) to one another. This precision is crucial for the alignment and overall integrity of the structures being built. By using a square, carpenters can accurately mark lines for cuts or assemblies, ensuring that joints fit together correctly and that the finished product is both functional and aesthetically pleasing.

When constructing frames, shelves, or any structure that requires right angles, the square helps in aligning the pieces accurately, which is vital for the stability of the finished work. Its role is pivotal in projects where even slight inaccuracies can lead to significant structural issues.