Higher - The gradients of two perpendicular lines will always multiply to make –1. Make sure you are familiar with finding the equation of a line and calculating gradient to understand equations of ...

“I think that maybe it’s not two circles but one,” says Sebastian, the protagonist of Edward St Aubyn’s scintillating new novel Parallel Lines to his newly discovered sister, Olivia. They are looking ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. Therapist Martin Carr is in a quandary. He has learnt that a new patient, Carmen, is already known to his ...

Whether you are sketching graphs in mathematics, understanding directions in geography, or reading blueprints in design class, horizontal and vertical lines are concepts you cannot avoid. They form ...