Biconditional
Conditional
Converse
Counterexample
Yes, it is an accurate definition.
No, it is not an accurate definition.
Two angles are adjacent if and only if they share a common side.
A point is the midpoint of a segment if and only if it is between the endpoints of the segment.
Two angles are supplementary if and only if they form a linear pair.
Two lines are parallel if and only if they never intersect.
D is the midpoint of Segment CE.
D is the midpoint of Segment AB.
Segment AB is perpendicular to Segment CE.
Segment AB has the same length as Segment CE.
If p → q and q → r are true statements, then p → r is a true statement.
If p → q is a true statement and p is true, then q is true.
If p → q is a false statement and p is false, then q is false.
If p → q and q → r are false statements, then p → r is a false statement.
Addition Property
Reflexive Property
Substitution Property
Transitive Property
M∠AEB = 83
M∠BEC = 97
∠AEB and m∠DEC are congruent angles.
# ∠BEC and m∠CED are vertical angles.
∠AOC
∠BOC
∠AOE
∠DOE
Adjacent angles; vertical angles
Vertical angles; adjacent angles
Adjacent angles; complementary angles
Vertical angles; supplementary angles
Symmetric Property
Substitution Property
Multiplication Property
Reflexive Property
I do not have room for dessert.
I did not finish my dinner.
I had macaroni and cheese for dinner.
No conclusion possible
14
10
7
2
Janina is shortest.
Janina is taller than Isabel.
Franz is the tallest.
Ellen is shorter than Isabel.