1.

Question

Test the following statement to see if it is reversible. If so, choose the true biconditional.

Parallel planes are planes that do not intersect.

Planes that intersect are not parallel planes

This statement is not reversible.

Planes are parallel if and only if they do not intersect.

Planes that do not intersect are parallel planes.

Answer 1

This statement is reversible.

The true biconditional is:

Planes are parallel if and only if they do not intersect.