It is a shape that you will never see in everyday life, which is a combination of a right angle like a key bracket and a lightning-shaped arrow. There is a theory that this symbol is 'a symbol ...

Arguably everything posted on Instagram is a distortion of reality (especially if you're a celebrity), but a video shared this week by the science account Physicsfun truly tests the laws of optics.

Space to play or pause, M to mute, left and right arrows to seek ... The plural for vertex is vertices. The angle is this bit the space where two rays meet. This is usually represented by ...

The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...