1.

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

Answer»

ong>Answer:

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



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