7-1 Classifying Angles

7-1 and 7-2 All About Angles

Chapter 7 Lessons 1 and 2

4 Kinds of Angles

• Acute: Less than 90 degrees

• Right: Exactly 90 degrees

• Obtuse: Greater than 90 degrees

• Straight: Exactly 180 degrees

Multiple Choice

What kind of angle is this?

• Open

• Acute

• Obtuse

• Straight

More Angles

• Check out the model:

• Vertical angles are angles that are opposite from each other. Also, they are congruent!

• Adjacent angles are beside each other. Also, they add to get 180 degrees!

Notes Example: Finding x

• Find x in the picture given.

• Final answer: x = 64 degrees

Multiple Choice

Find y in the given picture.

• 20 degrees

• 13 degrees

Multiple Choice

What kind of angle is this?

• Acute

• Obtuse

• Right

Multiple Choice

Find the missing value of x.

• 9 degrees

• 8.5 degrees