SAT Math· difficulty 3/5
Two parallel lines are cut by a transversal. One angle measures . Which of the following is NOT necessarily ?
the co-interior angle
the corresponding angle on the other line
the alternate exterior angle on the other line
the vertical angle
Explanation
Co-interior (same-side interior) angles are supplementary, so the co-interior angle would be , not . Vertical, corresponding, and alternate exterior angles are all .
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