2. Reflections
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The angle we are looking for is between the rays that start at O and pass through the points E and D.
Angle Measure: 30^(∘)
Classification: Acute
Let's first identify the angle we are looking for. The symbol ∠ EOD refers to the angle found between the rays that start at O and pass through the points E and D.
Examining the protractor, we can see that the ray traveling through E passes through 20^(∘). Also, the ray traveling through D passes through 50^(∘). By the Protractor Postulate, the measure of ∠ EOD is the difference between 50^(∘) and 20^(∘). m ∠ EOD: 50^(∘)-20^(∘)=30^(∘) Now, we can classify the angle using its measure.
Type | Measure |
---|---|
Acute | 0^(∘) |
Right | m=90^(∘) |
Obtuse | 90^(∘) |
Straight | m=180^(∘) |
Because our angle is 30^(∘), we know that it is acute.