The correct way to write the dimensions of area is:

1. Square brackets denote 'the dimensions of' the quantity inside them. 2. So the bracket belongs around the quantity, on the left of the equation. 3. Area is a length multiplied by a length, giving $L^2$ on the right. 4. The correct notation is therefore $[\text{Area}]=L^2$. 5. Writing $\text{Area}=[L]^2$ or trailing an empty bracket misplaces the notation, both of which were recorded errors. _Source: NECTA ACSEE 2023 Physics 131/1, Question 1: Measurement_