HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Basically, it's a portion of space (2-dimensional space obviously), that has a "shaded" and "not shaded" area. These areas are connected via a 'boundary', which is how we can even see the shapes.