Question

A circular lid to a water bottle has a diameter of 18 centimeters. Kelly is going to glue a ribbon around the edge of the lid of her water bottle so that she does not get it mixed up with someone else's. If Kelly has exactly enough ribbon, which measurement is closest to the length of the piece of ribbon in centimeters?

Answers

GPT 3.5
The circumference of a circle is calculated using the formula: circumference = π * diameter.

Given that the diameter of the lid is 18 centimeters, the radius would be half of the diameter, which is 9 centimeters.

So, the circumference of the lid would be:
circumference = π * 18 = 56.55 centimeters.

Therefore, Kelly would need approximately 56.55 centimeters of ribbon to glue around the edge of the lid.