Find the third side in simplest radical form (Pythagorean Theorem Level 2)

Answer:
√26
Step-by-step explanation:
a^2 + b^2 = c^2
5^2 + 1^2 = c^2
25 + 1 = c^2
c^2 = 26
√c^2 = √26
c = √26
√26