Answer :
In this case, we'll have to carry out several steps to find the solution.
Step 01:
data:
circle:
area = 2.4 cm²
Step 02:
geometry:
area of a circle:
A = πr²
radius:
[tex]\begin{gathered} 2.4\text{ cm}^2=\pi r^2 \\ \\ \frac{2.4\text{ cm}^2}{\pi}=r^2 \\ \\ \sqrt{\frac{2.4\text{ cm}^2}{\pi}}=r \\ \\ 0.87\text{ cm = r } \end{gathered}[/tex]The answer is:
r = 0.87 cm