👤

calculati aria unui patrat (in cm la patrat) stiind ca perimetrul sau este:a)96cmb)16dm

Răspuns :

P = 96 = 4L => L = 96 : 4 = 24 cm

A = L² = 24² = 576 cm²

P = 16 = 4L => L = 16 : 4 = 4 dm

A = L² = 4² = 16 dm²
Abc112
[tex]a)P = 96 \: cm[/tex]

[tex]P = 4l[/tex]

[tex]4l = 96 \: | \div 4[/tex]

[tex]l = 24 \: cm[/tex]

[tex]A = {l}^{2} [/tex]

[tex]A = {24}^{2} [/tex]

[tex]A = 576 \: {cm}^{2} [/tex]

[tex]b)P = 16 \: dm[/tex]

[tex]P = 4l[/tex]

[tex]4l = 16 \: | \div 4[/tex]

[tex]l = 4 \: dm[/tex]

[tex]A = {l}^{2} [/tex]

[tex]A = {4}^{2} [/tex]

[tex]A = 16 \: {dm}^{2} [/tex]