A pair of adjacent angles formed
by intersecting lines. Angles 1
and 2 below are a linear pair. So are angles 2 and 4, angles 3
and 4, and angles 1 and 3. Linear pairs of angles are supplementary.

this page updated
31-jan-16
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons