Answer:
20
Step-by-step explanation:
use pythagorean theorem:
[tex]12^{2}[/tex] + [tex]16^{2}[/tex] = [tex]c^{2}[/tex]
144 + 256 = [tex]c^{2}[/tex]
400 = [tex]c^{2}[/tex]
[tex]\sqrt[ ]{400}[/tex] = c
20 = c
