Afigure can be covered by 28 unit squares, without any gaps or overlaps. what is the area of the figure?

Remember that the area of a square is just one of its sides squared. 
where 
is the area of the square 
is one of the sides of the square

Unit square is a square whose sides have length 1, so lets use our formula to find the volume of one unit square:



We now know that each one of the squares has area 1 unit squared. Since there are 28 unit square in our figure, we are going to multiply the area of a unit square by 28 to find the area of our figure:
Area of the figure= units squared 

We can conclude that the area of the figure is 28 units squared.