please help needed please

Answer:
[tex]\sqrt{3}[/tex]
Step-by-step explanation:
Using the pythagoras theorem,
[tex]a^2 = b^2 + c^2[/tex]
Wherein a is the long side (2)
and b = 1
Hence,
[tex]2^2 = 1^2+c^2\\c^2 = 2^2 - 1^2\\c^2 = 4-1\\c^2 = 3\\c = \sqrt{3}[/tex]
Hence,
c = x = [tex]\sqrt{3}[/tex]