# What is the arclength between two points on a curve? How does it differ from the distance?

##### 1 Answer

Nov 8, 2015

The distance is the arc length on a straight line. The arc length is the distance along the arc.

#### Explanation:

**Example**

For the points

the distance between the points (the length of the straight line joining them) is

The length of the arc on the unit circle: