Find if points are within a circle with given center and radius

Question

We have a point (x,y) and a set of some other points (xi,yi). How can we determine which of (xi,yi) are within a circle with center (x,y) and radius r (a given number)?

Accepted Answer

```
(xi-x)**2 + (yi-y)**2 < r**2
```

Find if points are within a circle with given center and radius

Solution

Problem