Acircle has a circumference of 6. it has an arc of length 1/3

what is the central angle of the arc in degrees

Ф = 10°

Step-by-step explanation:

Regarding arc length, s:  s = r·Ф, where Ф is the central angle in radians and r is the radius.

We need to find the central angle, Ф, in this problem.

We know that C = circumference = 6, and that this leads to r = 6/π.

Substituting 6/π for r and 1/3 for s in Ф = s / r, we get:

Ф in radians = 1/3  /  (6/π), or  Ф = π/18 rad.    

                                                                           π         180°

Converting this into degrees, we multiply     by

                                                                           18        π rad

obtaining:  Ф = 10°

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4