Question

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

Answer 1

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

Answer 2

$a)P = 96 \: cm$

$P = 4l$

$4l = 96 \: | \div 4$

$l = 24 \: cm$

$A = {l}^{2}$

$A = {24}^{2}$

$A = 576 \: {cm}^{2}$

$b)P = 16 \: dm$

$P = 4l$

$4l = 16 \: | \div 4$

$l = 4 \: dm$

$A = {l}^{2}$

$A = {4}^{2}$

$A = 16 \: {dm}^{2}$