Question

what is the length of a square if it's perimeter is 81.6 cm​

Answer 1

Answer:

20.4 cm

Step-by-step explanation:

$p = 4s \\ s = 4 \div p \\ s = 81.6 \div 4 = 20.4 \: cm$

Answer 2

Answer:

I suppose you want to know the length of each side. in that case, formula is perimeter/4

so ans is 20.4 cm.

But if u need to know diagonal then we use pythagoras theorem.

Make a diagonal and we get 2 right triangles since square has all angles 90°.

Then by pythagoras theorem,

Diagonal^2= side^2+side^2

Diagonal^2= 20.4^2+20.4^2

solve and you will get diagonal as 28.8

hope it helps

pls mark as brainliest(i wanna reach virtuoso)

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