Question

Find the area of a semi-circle of with a radius of 4.1mm. round to the nearest tenth

Answer 1

26.4 mm²

Step-by-step explanation:

The area of a semi-circle can be calculated as:

`A=(\pi\cdot r^2)/(2)`

Where π is approximately 3.14 and r is the radius of the circle.

So, replacing r by 4.1 mm, we get:

`\begin{gathered} A=(3.14\cdot(4.1mm)^2)/(2) \\ A=(3.14\cdot16.81mm^2)/(2) \\ A=(52.7834)/(2)mm^2 \\ A=26.4mm^2 \end{gathered}`

Therefore, the answer is 26.4 mm²