CircleOptions circleOptions = new CircleOptions()
.center(marker.getPosition()) //set center
.radius(1000) //set radius in meters
.fillColor(Color.argb(20, 50, 0, 255))
.strokeColor(Color.BLACK)
.strokeWidth(3);
circle = mGoogleMap.addCircle(circleOptions);
radius(1000) 이라고 한다면 반경 몇미터쯤 되나요?