Respuesta :

circumference of the entire circle = 2 * PI * radius
circumference = 2 * PI * radius
circumference = 62.832
81 degrees is (81 / 360) or .225 of the entire circumference
so the 81 degree arc = .225 * 62.832 = 14.137 feet


Answer:

9/2

Step-by-step explanation: