Answer:
x = 13
Step-by-step explanation:
[tex]a^{2} +b^2 = c^2\\12^2 + 5^2 = c^2\\144 + 25 = c^2\\169 = c^2\\[/tex]
Take the square root of both sides
[tex]\sqrt{169} = \sqrt{c^2} \\13 = c[/tex]
