Naming Angles and Lines

Angle Types &
Naming Angles

Word Cloud

The next thing we are learning about is angles. What is something you think about when you hear the word "angles"?

Measures exactly 90^o.

Makes a corner.

_____ Angle

Measures less than 90^o.

_____ Angle

Measures more than 90^o.

______ Angle

Measures exactly 180^o.

Makes a "straight" line.

________ Angle

Categorize

Options (6)

Sort these angles into the right categories.

Acute Angles

Obtuse Angles

Right Angles

Usually, we name an angle using three letters.

The vertex is the middle letter.

The name of this angle can be written ∠AOB or ∠BOA.

We can also name an angle by its vertex: ∠O.

Naming Angles

Multiple Choice

What is the vertex of this angle?

• P

• Q

• R

Multiple Select

Select two names of this angle.

• ∠PQR

• ∠PRQ

• ∠RQP

• ∠QPR

Open Ended

Write one name for this angle.