Răspuns :
[tex]d = \sqrt{4^2+2^2+(\sqrt{29})^2}=\sqrt{16+4+29}=\sqrt{49}=7(cm)[/tex]
d² = L² + l² + i²
d² = 4² + 2² + (√29)²
d² = 16 + 4 + 29
d² = 49
d = √49
d = 7