Answer:
13
Step-by-step explanation:
We were already given the formula and were left with [tex]169 = c^2[/tex].
To find c we would find what by itself equals 169.
We know [tex]12 * 12[/tex] is 144
so its greater than 12
we also know that 13 * 13 is 169
so c would be equal to 169
