Question

The area of a square is 100. The length of its diagonal is approximately?

Answer 1

square means all sides are equal, right?
so side of the square is equal to what?

Answer 2

a=10
use Pythagorean theorem
http://en.wikipedia.org/wiki/Pythagorean_theorem
to find diagonal
\[c=\sqrt{a ^{2}+a ^{2}}=a \sqrt{2}\]
if a=10
then diagonal equal:
c=...
finish it please

Answer 3

gj inink

Answer 4

ok i get it now thank you so much