Last modified on August 3rd, 2023

chapter outline


Reflex Angle

What is a Reflex Angle

A reflex angle is an angle that measures more than 180° and less than 360°. In other words, a reflex angle is equal to the sum of 180° and any of the other primary angles such as acute, obtuse, or right angle.

Reflex Angle

Thus, for every acute or obtuse angle, there is a reflex angle. Mathematically, the relation is given as,

  • Reflex angle = 180° + Acute angle
  • Reflex angle = 180° + Obtuse angle
  • Reflex angle = 180° + Right angle

A few more examples of reflex angles are given below:

Examples of Reflex Angle

Reflex Angles in Real Life

The outside angle of anything that makes an acute, obtuse or a right angle such as:

  • Outside angles in a triangle, square, rectangle, trapezoid, pentagon, and hexagon
  • The letter A or V
  • A sliced pizza
  • Hands of a clock
  • A partially opened compass

Identify and mark the reflex angles in the given shapes.


The reflex angles in the given options (a), (b), (c), and (d) are shown alongside

Last modified on August 3rd, 2023

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