Angle Relationship Key Terms

Type of angles opposite sides of the transversal, inside two parallel lines

• alternate interior
• alternate exterior
• vertical
• supplementary

Type of angle formed when two lines intersect to form two pairs of opposite angles

• vertical
• alternate interior
• alternate exterior
• supplementary

A line that intersects two parallel lines

• transversal
• straight 
• perpendicular
• vertical

Type of angles whose sum is 180 degrees

• complementary
• supplementary
• straight
• adjacent

Lines that intersect to form a 90 degree angle.

• straight
• parallel
• perpendicular
• complementary

Type of angles whose sum is 90 degrees

• perpendicular
• vertical
• complementary
• supplementary

Figures that have the same shape and size.

• congruent
• corresponding
• complementary
• adjacent

Type of angles that share a vertex and a common side.

• vertical
• adjacent
• complementary
• supplementary

Type of angles opposite sides of the transversal, outside two parallel lines

• alternate interior
• corresponding
• alternate exterior 
• vertical

Type of angles in the same position in relation to the transversal.

• vertical
• adjacent
• complementary
• corresponding