please help me find the value of x

Answer:
[tex]10 \sqrt{3} [/tex]
Step-by-step explanation:
To find the value of x.
According to Pythagoras Theorem-
[tex] {20}^{2} = {10}^{2} + {x}^{2} [/tex]
[tex] = > 100 + {x}^{2} = 400[/tex]
[tex] = > {x}^{2} = 400 - 100[/tex]
[tex] = > {x}^{2} = 300[/tex]
[tex] = > x = \sqrt{300} [/tex]
[tex] = > x = 10 \sqrt{3} [/tex]
Hence, the required value of x is
[tex] 10\sqrt{3} [/tex]