How does geometry play a role in how a fort is structured? Objective Practice using the Pythagorean Theorem and learn how it can be applied to the real world Background The earthwork fort at Fort Raleigh National Historic Site was built by the second voyage to Roanoke Island in 1585. Lead by Sir Richard Grenville, 7 ships and 600 men sailed across the Atlantic from Europe with the goal of establishing a military colony on the island. Upon arrival the Tyger, one of the ships, takes damage and they lose most of their food supplies, forcing Grenville to return to England with most of the men to g Duration: 60 Minutes.