write the following reversible statement as a biconditional:

Question

If two perpendicular lines intersect, they form four 90 degree angles.

-Two intersecting lines are perpendicular if and only if they form four angles.
-Two intersecting, perpendicular lines do not form four angles.
-Four 90 degree angles are formed by intersecting lines.
-Perpendicular lines do not intersect.

I think it's the 3rd choice, but please correct me if I'm wrong.

Answer 1

Four 90 degree angles are formed by intersecting perpendicular lines.