# What is the distance between the following polar coordinates?:  (1,pi), (-1,pi)

Nov 23, 2015

#### Explanation:

A circle with radius 1 means this is a unit circle !

Now, $\pi$ radians is the same as 180 degrees which puts $\left(1 , \pi\right)$ at the cartesian coordinate of $\left(- 1 , 0\right)$.

Similarly, $\left(- 1 , \pi\right)$ is at the cartesian coordinate of $\left(1 , 0\right)$.

The distance between these two coordinates is simply 2 units .

hope that helps
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