Diagonala unui patrat de latura 13 radical 2 cm,este egala cu.....cm

[tex]d = l \times \sqrt{2} [/tex]

[tex]d = 13 \sqrt{2} \times \sqrt{2} [/tex]

[tex]d = 13 \sqrt{4} = 13 \times 2 = 26[/tex]

A pătrat=

[tex]l^{2} = ({13 \sqrt{2} })^{2} = 169 \times 2 = 338 \: cm^{2} [/tex]

A pătrat=

[tex]d ^{2} \frac{1}{2} = > d^{2} = 2 \times \: a \: patrat = 2 \times 338 = 676 cm^{2}[/tex]

[tex]d^{2} = 676 = > d = \sqrt{676} = 26 \: cm[/tex]