Like the people King Arthur was fighting: Sutton Hoo invaders' helmet (500s-600s AD, now in the British Museum) The end of Roman Britain When Constantine III revolted in England in 406 AD and [...]
This is an equilateral triangle. What makes a triangle equilateral? Equilateral triangles have all three sides exactly the same length. Because their sides are the same length, the three angles of an equilateral triangle are also [...]
Two lines cross and form four angles Where any two lines cross each other, they form four angles. These angles are parts of a circle (as you can see from the green circle segments), [...]
