input: Write a function to calculate the distance between two points on a two-dimensional plane. The function should take two tuples representing the coordinates of the points and return the distance as a floating-point number.
  
  def calculate_distance(point1, point2):
      x1, y1 = point1
      x2, y2 = point2
      distance = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5
      return distance
  
  assert calculate_distance((3, 4), (-9, -2)) == 13.0
  assert calculate_distance((0, 0), (0, 0)) == 0.0
  assert calculate_distance((1, 1), (2, 2)) == 1.4142135623730951
  assert calculate_distance((-3, 5), (7, -2)) == 12.206555615733702
  assert calculate_distance((1, 1), (3, 3)) == 2.8284271247461903
output: def calculate_distance(point1, point2):
      x1, y1 = point1
      x2, y2 = point2
      distance = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5
      return distance