How is the following program calculated to output 7.2111?

Question

class Point {
constructor(x, y) {
this.x = x;
this.y = y;
}

static distance(a, b) {
const dx = a.x - b.x;
const dy = a.y - b.y;

return Math.hypot(dx, dy);
}
}

const p1 = new Point(7, 2);
const p2 = new Point(3, 8);

console.log(Point.distance(p1, p2));

Answer 1

dx and dy calculates the distances, obviously. It returns Math.hypot(dx, dy). This function is basically the same as:
√(dx² + dy²) (calculates the distance with the Pythagorean theorem). I'm guessing it was multiple inputs. You could count up, that dx and dy was 4 and 6 (doesn't matter if positive or negative). 4² + 6² equals 50, and you can then guess that its square root is a little bigger than seven (√49)