A combination square can layout a __ degree angle along with a 45 degree angle.

A combination square is a versatile tool often used in carpentry for various measuring tasks, including laying out angles. One of its primary functions is to measure 90-degree angles, which are essential in creating right angles in projects. The combination square typically includes a ruler that can adjust to create and measure different angles, but it is particularly adept at helping to layout both 45-degree and 90-degree angles.

In carpentry, 90-degree angles are fundamental because they ensure that pieces fit together correctly, contributing to the structural integrity of the construction. When you use the square, its 90-degree edge can guide your marking or cutting, making it crucial for tasks like framing walls, installing cabinets, or aligning furniture pieces. The other angles listed, such as 30, 60, and 120 degrees, do not typically relate as directly to the primary functions of a combination square, making 90 degrees the most relevant choice.