Which tool would be most effective for ensuring accurate right angles in a project?

The square is the most effective tool for ensuring accurate right angles in a project because it is specifically designed for that purpose. A square typically has a 90-degree angle, allowing users to check and mark right angles accurately. It is invaluable in woodworking, construction, and other crafts where precision is crucial.

Using a square helps establish straight and true lines when cutting or assembling materials, which is essential for the structural integrity of the project. Its design provides a reliable reference for creating corners and aligning components correctly, making it an essential tool for any craftsman.

Other tools have different functions that do not focus specifically on checking right angles. A level measures horizontal or vertical alignment rather than angles, a tape measure is primarily for measuring distances, and a chisel is used for cutting and shaping materials rather than marking angles. Therefore, while all these tools have important roles, the square stands out for its specific ability to ensure accurate right angles.