Answer:
26.4 mm²
Explanation:
The area of a semi-circle can be calculated as:
[tex]A=\frac{\pi\cdot r^2}{2}[/tex]Where π is approximately 3.14 and r is the radius of the circle.
So, replacing r by 4.1 mm, we get:
[tex]\begin{gathered} A=\frac{3.14\cdot(4.1mm)^2}{2} \\ A=\frac{3.14\cdot16.81mm^2}{2} \\ A=\frac{52.7834}{2}mm^2 \\ A=26.4mm^2 \end{gathered}[/tex]Therefore, the answer is 26.4 mm²
