I have some questions I have to answer can I get a formula for to find the diagonal length of any paper square? (it’s a project.)

Answer 1

if the side lengths of a rectangle are a and b
then A = a * b
If it is really a square then b = a
then
A = a^2

Answer 2

and
d^2 = a^2 + b^2
so
d = sqrt (a^2+ b^2)
and
if really square b = a
and
d = a sqrt 2

Answer 3

Thanks!

Answer 4

You are welcome.