# Question #ec325

##### 1 Answer

The perpendicular from origin

It's length is

#### Explanation:

*Normal* to a curve at point **line perpendicular to a tangent** to a curve at this point (presuming the curve is smooth and has a tangent, otherwise a normal is undefined).

Since

So, our task is to measure the length of

This is done by Pythagorean Theorem as the distance between two points:

origin

point