Question

One side of a square is 10 units. Which is greater, the number of square units for the área of the square or the number of units for the perimeter? Explain

Answer 1

Well since we know that a square has the same length all around and they gave us 10 lets use that:)
So in order to find area we need to multiply length times width sooo
Area = length x width 
since we already know that the width and length are both 10 lets plug them in
10 x 10 = 100
so our area for our square is 100units²
now lets put that aside for now.. and work on our perimeter 
so heres a picture of what our square would look like 
 
     ____10____
     |                   |
10 |                   | 10
     |                   |
     **************
              10 
The formula for perimeter is all of the sides added up so lets do that:)
10 + 10 + 10 + 10 = 40!
so our perimeter for this square is 40units 
now lets compare our two totals

area = 100units²
perimeter = 40units 
which one is bigger?
and of course area is bigger!
and finally lets answer your question:
area is bigger because after finding the totals, area equaled 100units² while the perimeter was only 40 units. 
if this helped you then dont forget tooo
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Answer 2

The area of the square would be greater. To get the area of a square you need to multiply the length and width of the square, therefore you would multiply 10x10 which comes out to be 100. The perimeter would only be 40.