First, lets remember the property of right triangles as follows. Given a right triangle with the form:
The following formula is true:
[tex]Z^2=m\times(m+n)[/tex]
So, in our case m=3 and m+n=7+3=10, if this we can find Z:
[tex]Z^2=3\times(7+3)\rightarrow Z^2=30\rightarrow Z=\sqrt[]{30}[/tex]
