4) Solve for c*
I need help asapppp

Answer/Step-by-step explanation:
C = 82
Pythagorean Theorem: a^2 + b^2 = c^2
[tex]80^{2} = 6400\\18^{2} = 324\\6400 + 324 = 6724\\\sqrt{6724} = 82[/tex]