Answer:
7.1 inches
Explanation:
A square has equal sides. Diagram of the square has been drawn in the attachment below.
Thus,
x = length of the diagonal of the square
Using Pythagorean Theorem,
x² = 5² + 5²
x² = 25 + 25
x² = 50
x = √50
x = 7.1 inches (nearest tenth)