Help me please. thank you!! <3

We will find the missing side or Hypotenuse using the pythogoras theorem...
[tex]\sf\:H^{2}=P^{2}+B^{2}[/tex]
[tex]\sf\:H^{2}= {5}^{2} + {10}^{2} [/tex]
[tex]\sf\:H^{2}=25 + 100[/tex]
[tex]\sf\:H^{2}=125[/tex]
[tex]\sf\:H = \sqrt{125} [/tex]
[tex]\sf\:H = 5 \sqrt{5} [/tex]