a)
[tex]( \sqrt{2} {)}^{2} + ( \sqrt{2} {)}^{2} = {x}^{2} \\ {x}^{2} = 2 + 2 \\ {x}^{2} = 4 \\ x = \sqrt{4} \\ x = 2[/tex]
b)
[tex]a \sqrt{3} = 9 \sqrt{3} [/tex]
[tex]9 \sqrt{3} = a \\ \\ [/tex]
Przekątna
[tex]2a = 9 \sqrt{3} \times 2 = 18 \sqrt{3} [/tex]
