Calculate the radius of a semi-circle given its area is 107.17 m2 and pi is 3.14.

Step 1: Solve 2.1.1 - Radius of the shooting circle
The shooting circle is a semi-circle.
Given area of semi-circle $A = 107.17 \text{ m}^2$.
The formula for the area of a semi-circle is $A = \frac{1}{2} \pi r^2$.
We are given $\pi = 3.14$.

We will use the given area to calculate the radius:

$$107.17 = \frac{1}{2} \times 3.14 \times r^2$$

Multiply both sides by 2:

$$$$