The angle we are looking for is between the rays that start at O and pass through the points A and B.
Angle Measure: 180^(∘) Classification: Straight
Practice makes perfect
Let's first identify the angle we are looking for. The symbol ∠ AOB refers to the angle found between the rays that start at O and pass through the points A and B.
Examining the protractor, we can see that the ray traveling through A passes through 180^(∘). Also, the ray traveling through B passes through 0^(∘). By the Protractor Postulate, the measure of ∠ AOB is the difference between 180^(∘) and 0^(∘).
m ∠ AOB: 180^(∘)-0^(∘)=180^(∘)
Now, we can classify the angle using its measure.
