Straight

Angles on a line

Angles on a line

Angles on a straight line add up to 180°. This fact can also be used to calculate angles.

  1. What are angles on a straight line called?

What are angles on a straight line called?

A straight angle is also called a 'flat angle'. A straight angle pair is a set of two adjacent angles on a straight line that add up to 180° If ∠A + ∠B = 180°, then ∠A and ∠B form a straight angle pair (linear pair).

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