Slice (cut) Shapes using rectangle in two separated parts

[wizard509]

Hi,

I'd appreciate help.
As showed in this screen-recording (http://bit.ly/2tVCGbN), I have used a rectangle to "Slice (cut) Shapes" on an image, but the remained parts are still connected.
Is it possible the sliced parts becomes separated from each other?

Thanks for assistance!
Carlos

Yes