Angle of inclination and Slope angle

Angle of inclination noun - Geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis.

Slope angle and angle of inclination are semantically related. In some cases you can use "Slope angle" instead a noun phrase "Angle of inclination".

Angle of inclination and slope angle are semantically related. You can use "Angle of inclination" instead a noun "Slope angle".