3 is a factor of 3, 6, 12

6 is a factor of 6, 12

12 is a factor of 12

Domain:- It is the set of all elements which are the first component of the set of ordered pairs and represent a particular relation.

For example:- If R = { ( 1, 1 ), ( 1, 2), ( 2, 1 ), (2, 2 ) } then the domain is { 1, 2 }

Range:- It is a set of all the second components of the ordered pair and represent a relation.

For example :- R = { ( a, c ), ( a, d ), ( b, c ), ( b, d ) } then range = {c, d }

1. Reflexive property:- A relation R is reflexive if x R x is true for all x, belonging to the domain of R.

   For example R = { ( 1, 1 ), ( 2, 2 ), ( 3, 3 ),
   ( a, a ) }

2. Symmetric relation:- A relation R is symmetric, if for every x R y that is true also have y R x (which is also true).

   In symbols 1) ( x, y ) Î R Þ ( y, x ) Î R

   D ABC ~ D PQR Þ D PQR Þ D ABC

   ~ = similar to

3. Transitivity:- A relation R is transitive if x R y and y R z implies that x R z.