
Jon S. answered 03/03/21
Patient and Knowledgeable Math and English Tutor
Use following formula:
arc angle
----- = -------
circumference 360 degrees
radius is 4 cm, then circumference is 2 * PI * 4 = 8 * PI = 25.12
7 angle
--- = --------
25.12 360
360 * 7 = angle * 25.12
angle = 100.32 degrees
Joseph R.
thank you have a great day :)03/03/21