1. Write the following reversible as a biconditional:
If two perpendicular lines intersect, they form four 90* angles.
A) Two intersecting lines are perpendicular if and only if they form four 90* angles.
B) Two intersecting, perpendicular lines do not form four angles.
C) Four 90* angles are formed by intersecting lines.
D) Perpendicular lines do not intersect.
Is the answer C? I really am confused how to do this since these kind of statements aren't easy for me to understand. Thank you!