The correct classification for the given angles is as follows:
An angle is a space between two intersecting lines at or close to the point where they meet.
Angles are usually measured in degrees.
Types of angles include:
An acute angle is an angle between two lines that measures less than 90 degrees.
An obtuse angle is an angle that is less than 180° but greater than 90°
A right angle is equal to 90°
From the given diagram:
∠AFB = 90 - 42° =
∠AFB = 48°
∠AFB is an acute angle.
∠DFB = 90° + 42°
∠DFB = 132°
∠DFB is an obtuse angle.
∠CFD is a quarter turn
∠CFD is a right angle.
In conclusion, angles are a measure of turn between two points.
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