Write the following statement as a biconditional:

If two angles are vertical angles, then they are congruent

A Two angles are vertical angles if and only if they are congruent. 

B Two angles are vertical angles if and only if they are congruent. 

C If two angles are congruent, then they are vertical angles

D If two angles are not vertical angles, then they are not congruent

1 answer

B Two angles are vertical angles if and only if they are congruent.