## Ray

A ray is a portion of a line. It starts at one point and goes endlessly in a direction. Chapter 4- Basic Geometrical Ideas- CBSE Class 6 Maths Study Material and NCERT Solutions

### Ray

A ray is a portion of a line. It starts at one point (called starting
point) and goes endlessly in a direction.

Examples of the ray are: Beam of light from a lighthouse and sun rays.

Thus a line segment $\fn_cm \bar{AB{\color{Blue} {\color{Blue} }}}$ extended endlessly in the direction from
A to B, is a ray denoted by $\fn_cm \vec{AB}$

The ray $\fn_cm \vec{AB}$ has one end (fixed) point called its initial point.

Rays $\fn_cm \vec{AB}$ and $\fn_cm \vec{BA}$ are two different rays.

Ray $\fn_cm \vec{BA}$ is a ray with initial point B and extends endlessly in the
direction from B to A.

CBSE Class 6 Study Material