Question 193665: Decide if the statement is true or false, form the converse, and decide if the converse is true or false. If both the statement and its converse are true, write a biconditional equivalent to the two statements.
...If two angles are adjacent, then they have a common vertex.
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! statement: IF two angles are adjacent, THEN they have common vertex, and a common side.
converse: IF two angles have a common vertex, and a common side, THEN they are adjacent angles.
Both original statement, and converse are true( in this case only, not usually)
therefore we can write a biconditional,
Two angles are adjacent, IF AND ONLY IF, they have a common vertex, and a common side.
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