Final answer:
The angle measure of the arc is approximately 0.2094 radians or 12 degrees.
Step-by-step explanation:
The angle measure of an arc can be found by using the formula: angle measure = arc length / radius.
In this case, the arc length is given as π feet and the radius is given as 15 feet. So the angle measure can be calculated as: angle measure = π / 15.
Using a calculator, the angle measure can be approximated to angle measure ≈ 0.2094 radians or angle measure ≈ 12 degrees.