Which tool is typically used to quickly check 90-degree angles in carpentry?

• A. Speed Square
• B. Framing Square
• C. Measuring Tape
• D. Open End Wrench

Answer: (A)

The ability to quickly verify a right angle in carpentry rests on using a tool built to establish 90 degrees in a compact, transferable form. The speed square is designed with a built-in 90-degree corner and a 45-degree angle, so you can place its straight edge along one edge of a workpiece and press the corner against the other edge to confirm a true right angle. It’s also handy as a saw guide and for marking perpendicular lines on common framing tasks, making it the fastest and most versatile choice for this purpose. The framing square can check right angles too, but it’s larger and less convenient for quick checks on small pieces. A measuring tape measures length, not angles, and an open-end wrench is used for fastening, not angle measurement.