$\text{I.}$

$\text{Pole prostokąta:}$

$\text{P}=\text{a}\cdot \text{b}=2,5\text{cm}\cdot 1,6\text{cm}=4{\text{cm}}^2$

$\text{Pole kwadratu:}$

$\text{P}={\text{a}}^2=4{\text{cm}}^2$

$\text{a}=2\text{cm}=20\text{mm}$

$\text{I.: C, D}$

 

$\text{II.}$

$\text{V}={\text{a}}^3$

$24{\text{cm}}^3={\text{a}}^3$

$\text{a}=\sqrt[3]{24}$

$\text{a}=\sqrt[3]{8\cdot 3}$

$\text{a}=2\sqrt[3]{3}$

$\text{II.: B, C}$

 

$\text{III.}$

${\text{P}}_{\text{c}}=6\cdot {\text{a}}^2$

$6\cdot {\text{a}}^2=72\mid :6$

${\text{a}}^2=12$

$\text{a}=\sqrt{12}$

$\text{a}=\sqrt{4\cdot 3}=2\sqrt{3}\text{dm}=20\sqrt{3}\text{cm}$

$\text{III.: A, B}$