What is the best tool for bisecting an angle during layout work?

The best tool for bisecting an angle during layout work is the dividers. Dividers allow the user to measure and transfer specific distances and create arcs or circles, which are essential for accurately finding the angle's midpoint. When bisecting an angle, dividers can effectively mark points equidistant from the vertex along the angle's sides. By using the dividers to step off equal lengths from the angle’s vertex to the sides, you can easily identify the bisector's position.

In contrast, while a ruler helps in measuring lengths and straight lines, it does not provide a method for finding angle bisections directly. A protractor can measure angles effectively but does not assist in the geometric construction necessary for bisection. A compass can create arcs but is less suited for the precise marking of angle bisection compared to dividers, which are specifically designed for layout tasks requiring accuracy and ease in finding midpoints.