Answer:
Use this formula for these kinda things.
Step-by-step explanation:
Remember The z is the hypathonous, it means the biggest side.
[tex] {a}^{2} + {b}^{2} = {c}^{2} [/tex]
where Z is going to be C
put this all together
[tex] {7}^{2} + {18}^{2} = {z}^{2} [/tex]
put it into calculator, means 373=
[tex] {z}^{2} [/tex]
therfore take the square root, it will be
[tex]z = \sqrt{373} [/tex]
which it will be 19.31
