title: How to create a polygon from a central point with GeoDjango
body: <p>I want to create a polygon from a point and a radius.</p>
  
  <p>For example, I want to be able to give a point (latitude, longitude) with a given radius (ex. 10km) and calculate the circle and store it as polygon.</p>
  
  <p>The goal is to be able to query my application with points and ask it if the given point is within a given radius of another point.</p>
  
  <p>Maybe I'm doing it wrong, if there is a simplier way to achieve this I'd be glad to ear about it.</p>
  
  <p>Thanks</p>