I’m failing geometry:(
Hello guest!
\(r^2=(\frac{a}{2})^2+(\frac{a}{2})^2\\ r^2=(\frac{2cm}{2})^2+(\frac{2cm}{2})^2\\ r^2=2\cdot 1cm^2\\ r=\sqrt{2cm^2}\)
\(r=1.414cm\)
!
I do not think that is correct asinus.
My image is below.
I was going to give you teaching instruction but CPhill is answering so I am sure he will give you the whole lot.
I hope you have the sense to learn from it.