Final answer:
A degree is divided into minutes of arc, and each minute is further divided into seconds of arc for precise measurement of angles.
Step-by-step explanation:
Units of Angular Measurement
For a more precise reading of a location, a degree is divided into minutes of arc. Each minute is then divided into seconds of arc
For example, an angle of 35 degrees, 43 minutes, and 9 seconds is denoted as 35° 43' 9".