# In a Unit Circle what do the radian values mean?

##### 1 Answer

Oct 22, 2015

A radian relates directly to the radius of the unit circle.

#### Explanation:

A unit circle, by definition, has a radius equal to 1 unit.

Also, 1 radian equals the length of the radius of the circle. So, for a **unit circle** , 1 radian = 1 unit.

If you measure the length around the entire unit circle (also known as the **circumference** ), it will equal

Relating this to circumference of a **unit circle** :

hope that helped