Final answer:
A circular feature less than or equal to 180 degrees is denoted as an angle, and when precision is needed, it is expressed in degrees, minutes, and seconds of arc. For navigation and celestial measurements, bearings and celestial coordinates are used to express such angles.
Step-by-step explanation:
A circular feature less than or equal to 180 degrees is typically denoted as an angle. In the context of astronomy or navigation, angles may be expressed in degrees, minutes, and seconds of arc. One degree contains 60 minutes of arc, and one minute of arc contains 60 seconds of arc. A circular feature less than or equal to 180 degrees is denoted as an angle, and when precision is needed, it is expressed in degrees, minutes, and seconds of arc. For navigation and celestial measurements, bearings and celestial coordinates are used to express such angles.
For example, an angle of 35 degrees, 20 minutes, and 15 seconds would be written as 35° 20' 15". Such a method of denotation ensures precision for tasks like celestial navigation or measuring celestial coordinates. When measuring larger angles that encompass the entire circular feature, a bearing might be used, always written as a three-digit number, such as 080° for 80 degrees.