Question

Calculati aria unui patrat cu latura de :
a)4 cm
b) 3,5 dm
c) 1,(3) cm

Answer 1

Aria la patrat este $l^2$

$a)l=4cm=>l^2=4*4cm^2=16cm^2$

$b)3,5dm=35cm$
  $l^2=35^2*cm^2=1225cm^2$

$c) 1,(3)= \frac{4}{3}$
$l^2= (\frac{4}{3})^2*cm^2= \frac{16}{9}cm^2$