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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