Question

Is the following definition of perpendicular reversible? If yes, write it as a true biconditional.
Two lines that intersect at right angles are perpendicular.

a) The statement is not reversible.

b)Yes; if two lines intersect at right angles, then they are perpendicular.<<< 13 years ago

Answer 1

(d); the reverse is that if two lines are perpendicular, then they are intersect at right angles (which is true). The biconditional is of the form "p iff q", i.e. two lines intersect at right angles iff they are perpendicular.

Answer 2

Thank you!