Geometry Vocabulary

What is the sum of the measures of complementary angles?

• 90°

• 180°

• 360°

What is the sum of the measures of supplementary angles?

• 180°

• 360°

• 45°

What are vertical angles?

• Angles with a common vertex and sides formed by the same lines

• Angles that add up to 90°

• Angles that add up to 180°

What is a vertex?

• A line that crosses parallel lines

• A point common to both sides of an angle

• A line that never meets another line

What are adjacent angles?

• Angles with a common vertex and one common side

• Angles that add up to 180°

• Angles that are parallel

What are alternate exterior angles?

• A pair of exterior angles on opposite sides of the transversal

• A pair of interior angles on the same side of the transversal

• Angles that are parallel

What are alternate interior angles?

• A pair of interior angles on the opposite side of the transversal

• A pair of exterior angles on the same side of the transversal

• Angles that add up to 180°

What are corresponding angles?

• A pair of angles in similar positions

• Angles that add up to 90°

• Angles that are parallel

What is a transversal?

• A line that crosses parallel lines

• A line that never meets another line

• A pair of angles in similar positions

What are parallel lines?

• Lines in the same plane that never meet

• Lines that cross each other

• Lines that form a 180° angle