Question

PLEASE HELP I GIVE THANKS

Answer 1

Use the pethagorem theorem!
$a^{2} + b^{2} =c^{2}$
in this case, a will be 9, b will be 1(it can be a is 1 and b is 9), and solve for c.
$9^{2}+1^{2}=c^{2}$
$81+1=c^{2}$
$\sqrt{82} =c$