Perimeter of a square= Equation

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• October 12th 2010, 09:29 AM
bdubb
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
• October 12th 2010, 09:40 AM
RHandford
Sorry (Angry)
• October 12th 2010, 11:17 AM
bdubb
Quote:

Originally Posted by RHandford
Sorry (Angry)

?

Still looking for help
• October 12th 2010, 11:22 AM
HallsofIvy
Do you understand what "square" means in reference to a geometric figure?
• October 12th 2010, 11:25 AM
harish21
first, all the sides(S) of a square are equal.

and

the sum of all 4 sides is the perimeter.
• October 12th 2010, 12:20 PM
bdubb
Yes I do. so it would be like 4S=42S :s
• October 12th 2010, 12:26 PM
franzpulk
Squares:
$Perimeter = 4S$

Rectangles:

$Perimeter = 2W + 2L$
• October 12th 2010, 04:36 PM
bdubb
eh.. im still confused
• October 12th 2010, 06:40 PM
franzpulk
• October 12th 2010, 09:18 PM
bdubb
Quote:

Originally Posted by franzpulk

They want a Equation tho :S
• October 12th 2010, 09:37 PM
franzpulk
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.
• October 13th 2010, 12:24 AM
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?
• October 13th 2010, 09:35 AM
bdubb
Quote:

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?
• October 13th 2010, 11:06 AM
franzpulk
Now, solve for s.
• October 13th 2010, 12:22 PM
bdubb
Quote:

Originally Posted by franzpulk
Now, solve for s.

Thought that was the answer O_o
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