# How do you find rectangular coordinate of r=3?

Mar 4, 2018

Geometrically , its a circle with radius 3 .

#### Explanation:

Since , r = $\sqrt{{x}^{2} + {y}^{2}}$ .

Here, r=3, hence ,

3=$\sqrt{{x}^{2} + {y}^{2}}$
implying , 9 = ${x}^{2} + {y}^{2}$, which is a equation of a circle with radius =3 and the required answer too.