Question

which biconditional is NOT a good definition?
A)a whole # is even if and only it is divisble by 2
B)2 lines are parallel if and only they do not intersect
C)3 points are collinear if and only they lie on the same line
D)2 line segments are congruent if and only if they have same length

Answer 1

B) y =2x+3 intersects with it self infinite times, but is indeed parallel to itself

Answer 2

so it is true that if they dont intersect they are parallel, but it is not true that if they are parallel then they dont intersect

Answer 3

THANKS