Save guides, add subjects and pick up where you left off with your BBC account. Plotted points on a graph are referred to as coordinates. Coordinates are pair of numbers written in the form \(({x} ...

The poster claimed that this was the longest straight-line path anyone could take without touching land. The problem was that such a claim was extremely difficult to prove mathematically.

Back when people thought the Earth was flat, it was almost heretical to suggest that traveling in a straight line for a long enough distance would eventually bring you back to your starting point.