Answer:
m∠BOC is 2.182 radian.
Step-by-step explanation:
Given,
Points B and C lie on the circle that having the radius 5 units and center O,
Such that, Arc BC = 10.91 units,
We know that,
The arc length is,

Where, r is the radius and
( in radians ) is the central angle made by the arc,
Here, r = 5 units, S = 10.91 units,
By substituting the values,


Hence, m∠BOC = 2.182 radian.