How to detect if a point is in a Circle?

Question

How can I test if a LatLng point is within the bounds of a circle? (Google Maps JavaScript v3)

The getBounds() method returns the bounding box for the circle, which

Answer 1

Why don't you simple calculate this with Pythagorean theorem? You know a²+b²=c². If c is lower than r (radius) you know it is inside.

var isInside=Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2) >= r*r;