Table of Contents

Last modified on April 22nd, 2021

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.

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:

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.**

Solution:

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

Last modified on April 22nd, 2021