A square has a perimeter of 12 cm. What is its area?

Question

zehanz · Answer

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The square has four sides, each called s.
Add them up. you get 12.
Now calculate s.
Then: how do you calculate the area of a square?

anonymous · Answer

i am still a little confused

zehanz · Answer

How many times s is 12?

strawberry17 · Answer

Since the perimeter is 12 and each side is equal, you can just divide 12 by 4 to get each length side. For a square, to find the area, all you have to do is multiply s by s. 
The value of s is 4 (in this case).

zehanz · Answer

So s+s+s+s=12, or 4s=12, so s=12/4.

We've found : s=3.

So you have a square with side 3. Now how would you calculate the area?

anonymous · Answer

is the answer 36

zehanz · Answer

|dw:1366139655805:dw| Just count the little squares...

anonymous · Answer

9

zehanz · Answer

The area of a square with side s is defined as $A=s^2$.
Set s=3 in this formula. Or look at the second drawing :)

Yes, it's 9!