Angle Relationships

Ray

• 
• A type of fish

• A unit of measurement

• A beam of light

Vertical Angles

• 
• Angles that are adjacent to each other.

• Angles that are complementary to each other.

• Angles that are supplementary to each other.

Right Angle

• 
• 45 degrees

• 180 degrees

• 360 degrees

Obtuse Angle

• 
• An angle equal to 90 degrees

• An angle less than 90 degrees

• An angle equal to 180 degrees

What is the Angle Sum Theorem?

• 
• The sum of the angles in a triangle is 90 degrees.

• The sum of the angles in a quadrilateral is 360 degrees.

• The sum of the angles in a triangle is 360 degrees.

Linear Pair

• 
• A pair of angles that are complementary.

• A pair of angles that are vertical.

• A pair of angles that are equal.

Acute Angle

• 
• An angle equal to 90 degrees

• An angle greater than 90 degrees

• An angle equal to 180 degrees

Supplementary Angles

• 
• Angles that add up to 180 degrees

• Angles that are equal in measure

• Angles that are adjacent to each other

What is the Exterior Angle Theorem?

• 
• The exterior angle of a triangle is always greater than the interior angles.

• The exterior angle of a triangle is equal to the difference of the two opposite interior angles.

• The exterior angle of a triangle is equal to the adjacent interior angle.

Alternate Interior Angles

• 
• Angles that are supplementary when two parallel lines are cut by a transversal.

• Angles that are adjacent when two parallel lines are cut by a transversal.

• Angles that are complementary when two parallel lines are cut by a transversal.