SOLUTION: Which of the following is true? Adjacent angles are supplementary or complementary. Linear pairs are adjacent and supplementary. Vertical angles

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Question 802322: Which of the following is true?
Adjacent angles are supplementary or complementary.
Linear pairs are adjacent and supplementary.
Vertical angles are equal and supplementary.
Adjacent angles are linear pairs or are complementary.
Answer by MathLover1(20849) About Me  (Show Source):
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Adjacent angles are supplementary or complementary.: not true
reason: Definition and properties of adjacent angles - those that share a common leg or ray. (means the sum of both doesn't have to be exactly 90 or 180 degrees )

Linear pairs are adjacent and supplementary.: TRUE
reason: Definition and properties of a linear pair of angles - two angles that are adjacent and supplementary.
Vertical angles are equal and supplementary.: not always true, only if two lines that cross are perpendicular to each other
reason: Vertical angles are the angles opposite each other when two lines cross and share the same Vertex (corner point), not the usual meaning of up-down.
Adjacent angles are linear pairs or are complementary.not true
reason: Two angles are Adjacent if they have a common side and a common vertex (corner point) and don't overlap.
so, by definition, they cannot be linear and they could but don't have to be complementary