Final answer:
An angle can be expressed in degrees, minutes, and seconds. Each degree contains 60 minutes, and each minute contains 60 seconds.
Step-by-step explanation:
An angle can be expressed in degrees, minutes, and seconds. The symbol for degrees is °, for minutes is ', and for seconds is ". Each degree contains 60 minutes, and each minute contains 60 seconds. To express an angle in degrees, minutes, and seconds, you simply write the value for each component separated by the respective symbols. So, for example, 45° would be the angle expressed in degrees only, 45° 30' would be the angle expressed in degrees and minutes, and 45° 30' 20" would be the angle expressed in degrees, minutes, and seconds.