Miter_square
Miter square
Hand tool used for marking and checking angles
A miter square or mitre square is a hand tool used in woodworking and metalworking for marking and checking angles other than 90°. Most miter squares are for marking and checking 45° angles and its supplementary angle, 135°.[1][2]
A miter is a bevelled edge – usually 45° – used, for example, for making miter joints for woodworking.[2] Squares are tools designed for marking and checking specific fixed angles, usually 90° or 45°, though most squares are exclusively for working with 90° angles.