What is a straight angle?

A straight angle is an angle that measures exactly 180 degrees. It resembles a straight line.

Key characteristics of a straight angle:

• Measure: Always 180 degrees.
• Appearance: Forms a straight line.
• Relationship to other angles: It's half of a full rotation (360 degrees).
• Supplementary angles: If two angles form a linear pair, they are supplementary and their measures add up to 180 degrees, forming a straight angle. Therefore, each angle is the supplement of the other.