The angle we are looking for is between the rays that start at O and pass through the points C and B.
Angle Measure: 120^(∘) Classification: Obtuse
Practice makes perfect
Let's first identify the angle we are looking for. The symbol ∠ COB refers to the angle found between the rays that start at O and pass through the points C and B.
Examining the protractor, we can see that the ray traveling through C passes through 120^(∘). Also, the ray traveling through B passes through 0^(∘). By the Protractor Postulate, the measure of ∠ COB is the difference between 120^(∘) and 0.
m ∠ COB: 120^(∘)-0^(∘)=120^(∘)
Now, we can classify the angle using its measure.
