What is the least count value of try square?

The least count of a try square is typically determined by its smallest division or measurement that can be accurately read on the scale. In most cases, a try square does not have a least count like a measuring instrument with a graduated scale, as it is primarily used for checking right angles rather than measuring dimensions. However, if it has a scale marked on it, the least count would correspond to the smallest division on that scale. Generally, for practical purposes, try squares are used to ensure accuracy in right angles rather than precise measurements.