However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used special globes and instruments to ... National Museum of ...

However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used special globes and instruments to ... National Museum of ...

This find hinted at an ancient appreciation for geometry and symmetry ... these spheroids could envisage something as abstract as a sphere and impose that conception in reality by shaping a ...