Final answer:
The term that best describes an arc that measures 204 degrees is a minor arc.
Step-by-step explanation:
The term that best describes an arc that measures 204 degrees is a minor arc.
An arc is a portion of the circumference of a circle. In this case, the arc measures 204 degrees, which is less than 180 degrees but more than 90 degrees. A minor arc is defined as an arc that measures less than 180 degrees but more than 0 degrees.
Therefore, the correct term to describe an arc that measures 204 degrees is minor arc.