Among units of measurement for angles, the degree and the radian are the most commonly used, by far.
Altitude is the angle measured above the horizon.
the angle of incidence is the angle measured between the normal and the incident ray.. the angle of reflection is the angle measured between the reflected ray and the normal..
A reflex angle
With a protractor
An angle is positive when it is measured in a counter-clockwise direction. It is negative when it is measured in a clock-wise direction.
Altitude is the angle measured above the horizon.
The point about which an angle is measured
the angle of incidence is the angle measured between the normal and the incident ray.. the angle of reflection is the angle measured between the reflected ray and the normal..
A reflex angle
With a protractor
Altitude is the angle measured above the horizon.
An angle is positive when it is measured in a counter-clockwise direction. It is negative when it is measured in a clock-wise direction.
straight angle
Usually an angle is measured in degrees or radians.
Transit
Angles are usually measured in degrees. They can also be measured in radians.
To measure an angle: # Align the bottom line of the protractor with one ray of the angle being measured. # Center the central point along the bottom of the protractor with the junction of the angle being measured. # Find where the other ray of the angle crosses the rounded part of the protractor. The numbered mark at which it crosses is the number of degrees of the angle being measured.