Most trigonometry students look at triangles on a flat surface. However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used ...

Pythagoras' theorem - Part 2 Learn more about Pythagoras' theorem with this BBC Bitesize Maths article. For students between the ages of 11 and 14. Introduction to trigonometry for right-angled ...

We Kentuckians are lucky because we can learn all the science we need by ... those calculations without using algebra, geometry, or trigonometry. Figures don’t lie, but liars figure.