21. a. m/A b. m CE c. m/C d. m/D e. m/ABE A 80° B 80° 25° 0 E D
Trigonometry (MindTap Course List)
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Chapter3: Additional Topics In Trigonometry
Section: Chapter Questions
Problem 40CT: To determine the angle of elevation of a star in the sky, you align the star and the top of the...
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Please answer this! TY! It has to do with inscribed
![### Geometry Problem: Angle Measurements in a Circle
**Question 21.**
Determine the measures of the following angles and arcs in the given circle diagram:
**a.** \( m \angle A \)
**b.** \( m \overset{\frown}{CE} \)
**c.** \( m \angle C \)
**d.** \( m \angle D \)
**e.** \( m \angle ABE \)
**Diagram Explanation:**
The diagram depicts a circle with center \(O\). Five points, labeled \(A\), \(B\), \(C\), \(D\), and \(E\), are on the circumference of the circle. The points are connected in such a way that they form several triangles inside the circle. Key features and marked angles include:
- \(\angle ABD\) is marked as \(25^\circ\).
- Two angles \(\angle ADC\) and \(\angle AEC\) are marked as \(80^\circ\).
### Analyzing the Diagram
From the given diagram, here are the key observations:
- \( \angle ABD \) is an inscribed angle that intercepts arc \(AD\).
- \( \angle ADC \) and \( \angle AEC \) indicate that they are parts of intersecting chord angles.
### Definitions and Theorems to Use
1. **Inscribed Angle Theorem:** An inscribed angle is half the measure of the intercepted arc.
2. **Angle Formed by Intersecting Chords:** The measure of an angle formed by two intersecting chords is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.
3. **Sum of Angles in a Circle:** The total measure of angles around a point (such as the center of the circle) is \(360^\circ\).
Using these principles, the values for the requested angles and arcs can be calculated.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9359044e-f021-4fc6-a0ad-5a2dc758cf44%2F53fb84e0-2db3-4364-89a3-c76454972e9f%2Fzdauy8_processed.png&w=3840&q=75)
Transcribed Image Text:### Geometry Problem: Angle Measurements in a Circle
**Question 21.**
Determine the measures of the following angles and arcs in the given circle diagram:
**a.** \( m \angle A \)
**b.** \( m \overset{\frown}{CE} \)
**c.** \( m \angle C \)
**d.** \( m \angle D \)
**e.** \( m \angle ABE \)
**Diagram Explanation:**
The diagram depicts a circle with center \(O\). Five points, labeled \(A\), \(B\), \(C\), \(D\), and \(E\), are on the circumference of the circle. The points are connected in such a way that they form several triangles inside the circle. Key features and marked angles include:
- \(\angle ABD\) is marked as \(25^\circ\).
- Two angles \(\angle ADC\) and \(\angle AEC\) are marked as \(80^\circ\).
### Analyzing the Diagram
From the given diagram, here are the key observations:
- \( \angle ABD \) is an inscribed angle that intercepts arc \(AD\).
- \( \angle ADC \) and \( \angle AEC \) indicate that they are parts of intersecting chord angles.
### Definitions and Theorems to Use
1. **Inscribed Angle Theorem:** An inscribed angle is half the measure of the intercepted arc.
2. **Angle Formed by Intersecting Chords:** The measure of an angle formed by two intersecting chords is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.
3. **Sum of Angles in a Circle:** The total measure of angles around a point (such as the center of the circle) is \(360^\circ\).
Using these principles, the values for the requested angles and arcs can be calculated.
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