Răspuns:
C
Explicație pas cu pas:
sin 45° = [tex]\frac{\sqrt{2}}{2}[/tex]
cos 45° = [tex]\frac{\sqrt{2}}{2}[/tex]
[tex](2*\frac{\sqrt{2}}{2}+\frac{\sqrt{2} }{2})[/tex] × 4
[tex](\frac{2\sqrt{2} }{2} +\frac{\sqrt{2} }{2} )[/tex] × 4
[tex]\frac{3\sqrt{2} }{2}[/tex] × 4
[tex]\frac{12\sqrt{2} }{2}[/tex] = [tex]6\sqrt{2}[/tex]