Correct option is C
An angle plate is a precision tool used in metalworking to hold workpieces at a precise angle, usually perpendicular, during machining or inspection processes. The angle between the two surfaces of a standard angle plate is 90°. This right angle is essential for ensuring that workpieces are held securely at an accurate and consistent angle relative to the base surface, which is crucial for various machining operations.
45° and 120° are not standard angles for angle plates.
180° would imply a flat surface, not an angle.
Therefore, the correct angle between the two surfaces of an angle plate is 90°.
