On the planet Vulcan, Spock decides to reproduce the approach of Eratosthenes to measure the circumference of Vulcan, which we assume to be a perfectly spherical planet. His home town is directly north of the Vulcan Council building. Using extremely precise measurements

of shadows, Spock determines that the distance between his home town and the Vulcan Council building is 14.58 kilometers, and the angle between them is 7 arcminutes (not 7 degrees). Use this to calculate the circumference of Vulcan, and show all of your steps as usual.