Question

Calculati aria unui patrat stiind ca perimetrul sau este 96 cm 16 dm 80.4 mm 8.56 dm

Answer 1

$P = 96 \: cm$

$P = 4l$

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

$l = 24 \: cm$

$A = {l}^{2} = {24}^{2} = 576 \: {cm}^{2}$

$P = 16 \: dm$

$P = 4l$

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

$l = 4 \: dm$

$A = {l}^{2} = {4}^{2} = 16 \: {dm}^{2}$

$P = 80.4 \: mm$

$P = 4l$

$4l = 80.4 \: | \div 4$

$l = 20.1 \: mm$

$A = {l}^{2} = {20.1}^{2} = 404.01 \: {mm}^{2}$

$P = 8.56 \: dm$

$P = 4l$

$4l = 8.56 \: | \div 4$

$l = 2.14 \: dm$

$A = {l}^{2} = {2.14}^{2} = 4.5796 \: {dm}^{2}$