a)
[tex]a = \sqrt{6} \\ b = \sqrt{5} [/tex]
P = a × b
[tex] \sqrt{6} \times \sqrt{5} = \sqrt{30} [/tex]
Obwód = 2 × a + 2 × b
[tex]2 \times \sqrt{6} + 2 \times \sqrt{5} = 2 \sqrt{6} + 2 \sqrt{5} [/tex]
b)
[tex]a = \sqrt{7} [/tex]
P = a²
[tex]( \sqrt{7} ) ^{2} = 7[/tex]
Obwód = 4 × a
[tex] 4 \times \sqrt{7} = 4 \sqrt{7} [/tex]
