Angle Relationship Vocab

A pair of angles whose sum is 180 degrees

• complementary angles

• vertical angles

• supplementary angles

• congruent angles

A line that cuts two or more lines

• perpendicular lines

• parallel lines

• ray

• transversal

Formed by two lines or rays, which meet at a point called a vertex

• perpendicular

• angle

• intersecting lines

• triangle

An angle that measures more that 180 degrees but less than 360 degrees

• acute angle

• obtuse angle

• reflex angle

• straight angle

When two lines are cut by a transversal, a pair of angles on opposite sides of the transversal and outside the two lines

• same-side exterior angles

• alternate interior angles

• complementary angles

• alternate exterior angles

A pair of angles whose sum is 90 degrees

• supplementary angles

• congruent angles

• complementary angles

• vertical angles

Two angles that are adjacent and supplementary

• complementary angles

• corresponding angles

• supplementary angles

• linear pair

Lines that cross at a common point

• intersecting lines

• perpendicular lines

• parallel lines

• straight lines

An angle that measures between 0 and 90 degrees

• obtuse angle

• acute angle

• right angle

• straight angle

When two lines are cut by a transversal, a pair of angles on the same side of the transversal and inside the two lines

• alternate interior angles

• same-side interior angles

• corresponding angles

• same-side exterior angles