## Table of Contents

### 1. radian

**noun.** the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees).

#### Synonyms

### Sentences with radian

1. **Adjective**

The **radian** measure of an angle is the ratio between the length of the arc opposite the angle and the radius of the circle.

2. **Noun, singular or mass**

A **radian** is defined as the angle formed by a line that scribes an arc length on the circumference of a circle equal to the radius of the circle.