Adjacent.
And if the adjacent angles are supplementary (add up to be 180o), then it's a linear pair.
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Adjacent angles have a common side and a common vertex.
line
Two angles that share a common side and add up to 180 degrees are called right angles and are 90 degrees.
opposite angles
An angle is the intersection of two rays with a common endpoint. Adjacent Angles are 2 angles that share a common vertex, a common side and no common interior points.