Answer:
As Per Provided Information
- Length of diagonal of square is 4√2 cm
We have been asked to find the length , perimeter and area of square .
First let's calculate the side  of square .
Using Formulae

On substituting the value in above formula we obtain 

<u>Therefore</u><u>,</u>
- <u>Length </u><u>of </u><u>its </u><u>side </u><u>is </u><u>4</u><u> </u><u>cm</u><u>.</u>
Finding the perimeter of square.

Substituting the value we obtain

<u>Therefore</u><u>,</u>
- <u>Perimeter </u><u>of </u><u>square </u><u>is </u><u>1</u><u>6</u><u> </u><u>cm </u><u>.</u>
Finding the area of square .

Substituting the value we get

<u>Therefore</u><u>,</u>
- <u>Area </u><u>of</u><u> </u><u>square</u><u> </u><u>is </u><u>1</u><u>6</u><u> </u><u>cm²</u><u>.</u> 
 
        
             
        
        
        
Answer:
14s^4-7s^2+15
Step-by-step explanation:
At the beginning the only bracket that is changing is the 3rd one because of the minus. (12s^4-6s^2+4s)+(6s^4-4s+27)-4s^4+s^2+12 then open the rest of the brackets. And start calculating.i will just to show you which ones u calculate together. (I'll separate the numbers depending on what they're squared to). 
12s^4+6s^4-4s^4=14s^4
-6s^2-s^2=7s^2
27-12=15
All together is 14s^4-7s^2+15
 
        
             
        
        
        
Answer:
cndjxnn
Step-by-step explanation:
vncnfxjdncnnxxjjxnxxnjxxjdnxnxjxj, x
 
        
             
        
        
        
Answer:
3:1 
54:18
Step-by-step explanation:
You can divide both sides by 9 to get one ratio:
27/9:9/9
3:1
You can also multiply both sides by 2 to get another ratio:
27(2):9(2)
54:18