When two lines meet at a point the space between is called the angle. This space is the amount of turning from one line to the other.

Maths Three Dimensional Geometry Formulas: The class 12 mathematics course is predominantly calculus based but there are other chapters that hold significant importance and marks weightage in exams.

It is important to remember other angles rules, such as angles on a straight line add up to 180°, and to recognise angles in parallel lines. Make sure you are confident in applying Pythagoras’ theorem ...