[tex]( \frac{1}{2 \div \sqrt{2} }) {}^{2} \\t aking \: square \: we \: get \\ \frac{ {1}^{2} }{2 {}^{2} \div ( { \sqrt{2} })^{2} } \\ = \frac{1}{4 \div 2} = \frac{1}{2} [/tex]
