Which of the following is a true biconditional?

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

B. Two lines intersect if and only if their intersection is one point.

C. If two angles are a linear pair, then they are supplementary.

D. Two angles are adjacent if and only if they are a linear pair.

Question

Which of the following is a true biconditional?

A. Two angles are vertical if and only if they are congruent.

B. Two lines intersect if and only if their intersection is one point.

C. If two angles are a linear pair, then they are supplementary.

D. Two angles are adjacent if and only if they are a linear pair.

ganeshie8 · Answer

both directions it has to be true

ganeshie8 · Answer

chack each option and see which one works

anonymous · Answer

@ganeshie8 Is A the correct answer?

ganeshie8 · Answer

A. Two angles are vertical if and only if they are congruent.

check the both directions if it is true :-

Two angles are vertical, if they are congruent : True/ False ?
If two angles are vertical, then they are congruent : True/ False ?

anonymous · Answer

The first one is false, but the second one is true. Am I correct?

ganeshie8 · Answer

Correct ! so strike off A. similarly check all other options see for which u get True for both directions.