52,94°
the angle mesure of an arc devided by 360 (mesure of the angle of a circle) equals the arc length devided by the Circumference of the circle.
angle mesure of the arc length of the arc
___________________=______________________
360° Circumference
angle mesure of the arc 9,24 (3pi)
___________________=______________________
360° 62,83
360×9,24
________= angle mesure of the arc = 52,94°
62,83
the *_____* means it is a fraction
and the formula of the Circumference is
R×2×pi or d×pi
Hope it was helpful!!