Pendulums' paths are described as arcs, which is a curved line that is part of the circumference of a circle. An arc is defined as the path of a pendulum's motion, which is a weight suspended from a fixed point that swings back and forth under the influence of gravity. Pendulums are used in many applications, such as clocks, seismometers, and scientific experiments. The arc of a pendulum's path is determined by the length of the pendulum and the force of gravity.