a)
[tex]e = 4 \sqrt{5} \times \sqrt{2} = 4 \sqrt{10} cm[/tex]
b)
[tex]8 = f \sqrt{2} | \div \sqrt{2} \\ f = \frac{8}{ \sqrt{2} } \\ f = \frac{8 \sqrt{2} }{2} = 4 \sqrt{2} cm[/tex]
c)
[tex]h = 6 \sqrt{3} \times \sqrt{2} = 6 \sqrt{6}cm[/tex]
d)
[tex] \sqrt{2} =i \sqrt{2} | \div \sqrt{2} \\i = 1[/tex]