•
Type and size of the objects
•
Number of objects
•
Number of sides
•
Symmetries
•
Number and type of angles
•
Intersections
•
Colour of the objects
•
Position and direction of the objects
•
Type and size of the objects
•
Number of objects
•
Number of sides
•
Symmetries
•
Number and type of angles
•
Intersections
•
Colour of the objects
•
Position and direction of the objects
•
Type and size of the objects
•
Number of objects
•
Number of sides
•
Symmetries
•
Number and type of angles
•
Intersections
•
Colour of the objects
•
Position and direction of the objects
•
Type and size of the objects
•
Number of objects
•
Number of sides
•
Symmetries
•
Number and type of angles
•
Intersections
•
Colour of the objects
•
Position and direction of the objects