Angle Relationships

Angle Relationships

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Types of Angle Relationships

• Angles that add to 90° (look for the box); if there are just two angles, then they are called complementary

• Angles on a line add to 180° (look for a straight line that extends through the vertex); if there are just two angles, then they are called supplementary

• Angles at a point add to 360° (you need to know or have a common variable for all angles around the vertex)

• Vertical angles (they are opposite and equal)

Multiple Choice

What is true about vertical angles?

• They always measure 90°

• They are always opposite one another

• They are next to one another

• They are always obtuse

Multiple Choice

Find the value of x in the figure. 

• 68°

• 69°

• 78°

• 79°

Multiple Choice

Name a pair of vertical angles in the figure.

• ∠1 and ∠4

• ∠6 and ∠5

• ∠2 and ∠4

• ∠1 and ∠6

Multiple Choice

Classify the pair of angles shown.

• complementary angles 
• supplementary angles 
• vertical angles
• corresponding angles 

Multiple Choice

Classify the pair of angles shown. 

• supplementary

• complementary

• vertical 

• corresponding

Open Ended

What is one question I still have about angle relationships?