Question

Varianta 8 , ex 6 va rog

Answer 1

$\it \mathcal{A}= \ell^2=0,25=0,5^2\Rightarrow \ell=0,5dm=5cm\\ \\ \mathcal{P} = 4\cdot\ell=4\cdot5=20cm$

Answer 2

Răspuns:

$a = {l}^{2} \\ a = 0.25 {dm}^{2} \\ {l}^{2} = 0.25 {dm}^{2} \\ l = \sqrt{0.25 {dm}^{2} } \\ l = 0.5dm \\ l = 5cm \\ p = 4 \times l \\ p = 4 \times 5 \\ p = 20cm$

Explicație pas cu pas:

a= aria

p= perimetru

l= latura

dm= decimetru

cm= centimetru