Answer:
x = 5
Explanation:
All the sides of a square are equal
In the diagram shown, all the sides have a length x
The right-angled triangle formed form the square is drawn below
Using the Pythagoras theorem
[tex]\begin{gathered} (5\sqrt[]{2})^2=x^2+x^2 \\ 25(2)=2x^2 \\ x^2\text{ = }\frac{25(2)}{2} \\ x^2\text{ = 25} \\ x\text{ = }\sqrt[]{25} \\ x\text{ = 5} \end{gathered}[/tex]
