Hiya! ✌.ʕʘ‿ʘʔ.✌
Okay, so with a square, ALL sides are EQUAL.
To find the perimeter of a shape, you just need to add the measure of all sides together.
What you can do, is since all sides are equal, and a square has four sides, just get the measure of ONE side and multiply that by 4! (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
The perimeter is 72 meters and if we find the value of u, we get the value of all sides.
Let's set this up as an equation:
P = 4u where P = perimeter and u = measure of one side
Let's insert the given value (72) into the equation for perimeter
72 = 4u
Now we have to solve for u, and to do that, we have to get it by itself on that side of the equation. u is being multiplied by 4, so do the opposite by dividing both sides of the equation by 4!
72/4=18
4u/4=u
Now our equation looks like this:
18 = u
So the value of u is 18! (✿◠‿◠)
To prove it, insert it into the formula... P = 4(18)... P = 72.
Boom! :D
Have a lovely day~ ≧◡≦