Question

Define the term radian.

Short answer

A radian is defined as the angle subtended by an arc of length $\left(r\right)$of a circle and of radius $\left(r\right)$ at the center of the circle.

Step-by-step solution

Step 1. Write down the given information.

The given statement is to define the term radian.

Step 2. Defining the term radian.

A radian is defined as the angle subtended by an arc of length $\left(r\right)$ of a circle and of radius $\left(r\right)$ at the center of the circle. In the figure shown below, 1 Radian is shown as:

Step 3. Conclusion.

A radian is defined as the angle subtended by an arc of length $\left(r\right)$ of a circle and of radius $\left(r\right)$ at the center of the circle.