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Definition of an Angle
An angle is formed when two straight lines or rays meet at a common endpoint. The common point of contact is called the vertex of an angle. The word angle comes from a Latin word named ‘angulus,’ meaning “corner.”
Definition of a Degree
A degree usually denoted by ° is the unit of measurement for angles in which one full rotation is 360° (degrees).
Types of Angles
Zero degree Angle
When two lines are in the same direction with a common point and the angle measures as ZERO.
Angle that measures exactly 90o
Angle that measures more than 90° and less than 180°
Angle that measures exactly 180°
Angle that measures more than 180° and less than 360°
Full Degree Angle
The angle measures 360°, corresponding to the central angle of an entire circle.
Two angles that share the same vertex and have a side in common.
Two adjacent angles whose measures add up to 90°
Two adjacent angles whose measures add up to 180°
When two straight lines intersect each other, it forms two pairs of angles; each angle of each pair is directly opposite to its matching angle.