Question

The relation R={(a,b)/ Line a is perpendicular to line b in a plane} is​

Answer 1

Answer:

• R is not reflexive

because line a is not perpendicular to line

• R is symmetric

because if line a is perpendicular to b, then line b is

also perpendicular to line b

• R is not transitive

let line a is perpendicular to line b

and line b is perpendicular to line c

then line a is parallel to line c