Question

Somebody please help!! Need somebody to solve/explain this to me

Answer 1

P ⇔ Q is equivalent to the pair of conditionals P ⇒ Q and Q ⇒ P.

Your conditional statements are ...

1. If two lines intersect to form 4 right angles, then they are perpendicular.
2. If two lines are perpendicular, then they intersect to form 4 right angles.