If a metal is bent at a 135-degree angle, what is the actual bend angle of the metal?

When a metal is bent at a 135-degree angle, the actual bend angle is calculated based on the difference between the total angle around a bend versus the given angle. In this case, the total angle around a bend is 180 degrees.

To find the actual bend angle, you subtract the bend angle from 180 degrees. Therefore, the actual bend angle is:

180 degrees - 135 degrees = 45 degrees.

This calculation shows that the correct answer reflects the true angle of the bend in relation to the linear extension of the metal. Understanding this fundamental concept is crucial in metalworking and fabrication, as it ensures precision in the bending process and is critical for achieving desired shapes and maintaining structural integrity.