Question

Let T be the set of all triangles in the Euclidean plane, and let a relation R on T be defined as aRb. If a is congruent to b where a,b∈T, then R is:

Answer 1

relation R in a set A is called

reflexive,

reflexive,

if

(a,a)∈R

(a,a)∈R

for every

a∈A

a∈A

A relation R in a set A is called

symmetric

symmetric

, if

(

a

1

,

a

2

)∈R⇒(

a