Question

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

Answer 1

The position of the table lamp is at a distance of a units from the left edge of the top of the table and at a distance $b$ units above the bottom edge of the top of the table. We have marked the bottom edge as the line $AX$ and the left edge as the line $AY$. Here $AY\perp AX$. We measure all distances along $AX$ and $AY$ from the corner $A$. The position of the lamp can be described as $(a,b)$.

The position of the lamp can be described as $(a,b)$