Left and right are relative spatial directions defined by a person’s orientation or by a stated reference point; an object can be to the left or right of another object, and the relationship reverses when the viewpoint changes. This understanding supports describing positions in pictures, paths, and simple maps, while excluding more advanced coordinate systems, rotations, and formal transformations.
Left and right depend on whose point of view you use.
To find left and right:
Example:
Lina is facing the board. A book is next to her left hand, and a cup is next to her right hand.
If you stand facing Lina, the book may look like it is on your right. But it is still on Lina’s left, because Lina is the reference person.
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