"""simple docstring"""







from math import pi
def   __UpperCAmelCase    (   UpperCAmelCase_   :    int      ,							UpperCAmelCase_   :    int  )							->      float:

	'''simple docstring'''





	return 2 * pi * radius * (angle / 3_60)


if __name__ == "__main__":
		print(arc_length(90, 10))






"""simple docstring"""







def   __UpperCAmelCase    (   UpperCAmelCase_   :    list      ,							UpperCAmelCase_   :    int      ,							UpperCAmelCase_   :    int = 0      ,							UpperCAmelCase_   :    int = 0  )							->      int:

	'''simple docstring'''





	__snake_case      :							str						=			right or len(UpperCAmelCase_  ) - 1
	if left > right:
		return -1
	elif list_data[left] == key:
		return left
	elif list_data[right] == key:
		return right
	else:
		return search(UpperCAmelCase_      ,							UpperCAmelCase_      ,							left + 1      ,							right - 1  )


if __name__ == "__main__":
	import doctest

	doctest.testmod()





