How will you describe the position of a table lamp on your study table to another person?

(N/A) Consider that the lamp is placed on the table. Choose two adjacent edges,$DC$ and $AD$.
Draw perpendiculars from the position of the lamp to the edges $DC$ and $AD$ and measure the lengths of these perpendiculars.
Let the length of these perpendiculars be $30\, cm$ and $20\, cm$ respectively.
Now,the position of the lamp from the left edge $(AD)$ is $20\, cm$ and from the lower edge $(DC)$ is $30\, cm$.
This can be written as $(20, 30)$,where $20$ represents the perpendicular distance of the lamp from edge $AD$ and $30$ represents the perpendicular distance of the lamp from edge $DC$.