Class 7 Maths Lines and Angles | Introduction |

Geometry is that branch of mathematics that deals with various shapes, their properties and measurement.

**Point**has no length, width or height. It is simple represented by a dot - .**A line**is a combination of points that extends infinitely in both directions. It could be straight or curved.

**A line segment**is part of a line with fixed end points. For e.g. AB has a fixed length.

**A ray**is a line with a fixed end point and continues indefinitely in the other direction.

**Angles**are basic geometrical figures that tell us about the orientation of one surface with another or orientation of one line with another.

- Angle is measured in
**degrees**. - An angle consists of sides or
**arms**of the angle. - The common point of the arms is called as the
**vertex**.

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