math 9 term 1 week 2

Two angles that have the exact same degree measure.

Congruent angles

Two angles that sit right next to each other. They share a common vertex and a common side, but do not overlap (no common interior points).

Adjacent angles

Two angles whose measures add up to exactly 90

Complementary angles

Two angles whose measures add up to exactly 180

Supplementary angles

pair of adjacent angles whose non-common sides form a straight line

Linear pair

A pair of nonadjacent, opposite angles formed by two intersecting lines. They sit across from each other like an "X" and are always congruent.

Vertical angles

A line that cuts across two or more other lines at different points.

Transversal

Angles that sit in the exact same matching position at each intersection

Corresponding angles

A pair of nonadjacent angles that lie inside (between) the two main lines, but on opposite sides of the transversal line.

Alternative interior angles

A pair of angles that lie outside the two main lines, on opposite sides of the transversal line.

Alternate exterior angles

A pair of angles that lie inside (between) the two main lines and on the same side of the transversal line.

Same side interior angles

A pair of angles that lie outside the two main lines and on the same side of the transversal line.

Same side exterior angles