
Elementary Geometry For College Students, 7e
7th Edition
ISBN: 9781337614085
Author: Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher: Cengage,
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Transcribed Image Text:Title: Understanding Acute Angles in Circles
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**Question:**
Is ∠DOC an acute angle?
Es ∠DOC un ángulo agudo?
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**Diagram:**
This diagram features a circle with center \( O \). There are four labeled points on the circle: \( A \), \( B \), \( C \), and \( D \). Lines \( \overline{OA} \), \( \overline{OB} \), \( \overline{OC} \), and \( \overline{OD} \) are radii of the circle, dividing the circle into four segments.
**Explanation:**
- **Point \( O \):** The center of the circle.
- **Points \( A \), \( B \), \( C \), \( and D \):** Points on the circumference of the circle.
- **Radii \( \overline{OA} \), \( \overline{OB} \), \( \overline{OC} \), and \( \overline{OD} \):** These lines are connecting the center \( O \) to the points on the circumference.
**Question Details:**
- The specific angle in question is ∠DOC, formed by the radii \( \overline{OD} \) and \( \overline{OC} \).
- The term "acute angle" refers to an angle that is less than 90 degrees.
**Considerations:**
To decide whether ∠DOC is acute, observe the position of lines \( \overline{OD} \) and \( \overline{OC} \). If the angle formed between them is less than 90 degrees, it is considered acute.
**Answer Box:**
To the right of the question is a blank box where the answer can be input.
**Button:**
Below the diagram and question is an “OK” button to submit the answer.
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**Educational Notes:**
- An acute angle is always less than 90 degrees.
- A helpful way to visualize this is by comparing the angle to a right angle (which is exactly 90 degrees).
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