# Thread: Perimeter of a square= Equation

1. ## Perimeter of a square= Equation

The perimeter of a square is 42 Feet and the sides of the square are each S ft. ; Set up the equation expressing this.

two sides are S's on my assignment. other two are blank

2. Sorry

3. Originally Posted by RHandford
Sorry
?

Still looking for help

4. Do you understand what "square" means in reference to a geometric figure?

5. first, all the sides(S) of a square are equal.

and

the sum of all 4 sides is the perimeter.

6. Yes I do. so it would be like 4S=42S :s

7. Squares:
$\displaystyle Perimeter = 4S$

Rectangles:

$\displaystyle Perimeter = 2W + 2L$

8. eh.. im still confused

9. Originally Posted by franzpulk
They want a Equation tho :S

10. I just gave you all the necessary information. All it requires is plugging in the number given for the perimeter and the variable for the length of a side.
If this were a difficult problem I'd probably give you the answer, but I've given you everything you need.

11. Think of it this way:

- You have four sides, each part of the total perimeter
- You know that two of the sides are some number 's'
- By nature of being a square, all sides must be this number 's'
- So you have four sides of size 's', i.e. 4s (as you stated)

Now, think about what an equation is. It equates something on the left-hand side (LHS) to the right-hand side (RHS). You want to find 's', right? Well you know that the total perimeter is 4s, and you know the value of the total perimeter as 42. So what does the equation look like?

12. Originally Posted by glitch
think of it this way:

- you have four sides, each part of the total perimeter
- you know that two of the sides are some number 's'
- by nature of being a square, all sides must be this number 's'
- so you have four sides of size 's', i.e. 4s (as you stated)

now, think about what an equation is. It equates something on the left-hand side (lhs) to the right-hand side (rhs). You want to find 's', right? Well you know that the total perimeter is 4s, and you know the value of the total perimeter as 42. So what does the equation look like?
4s=42?

13. Now, solve for s.

14. Originally Posted by franzpulk
Now, solve for s.
Thought that was the answer O_o

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