12. Find the m DE. 3d 1240

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
icon
Related questions
icon
Concept explainers
Question
### Geometry Problem: Finding an Angle in a Circle

**Problem 12:** Find the **\( m \angle DE \)**.

**Diagram Description:**
- The image features a circle with three points marked on its circumference: \( F \), \( D \), and \( E \).
- There are three angles formed by lines drawn from these points to the center of the circle:
  - The angle \( \angle ADF \) measures **93°**.
  - The angle \( \angle ADE \) measures **124°**.
- You are asked to find the measure of \( m \angle DE \).

**Approach to Solution:**
- Knowing the sum of angles in a circle is 360°, you can calculate the missing angle.

**Step-by-Step Solution:**
1. Total sum of angles in a circle = 360°.
2. Known angles:
   - \( \angle ADF = 93° \)
   - \( \angle ADE = 124° \)
3. Sum of the given angles: \( 93° + 124° = 217° \).
4. Determine the measure of \( \angle DE \):
   - \( 360° - 217° = 143° \).

**Answer:** 
The measure of \( m \angle DE \) is **143°**.

#### Your Answer:
(Place for users to submit their answer)
Transcribed Image Text:### Geometry Problem: Finding an Angle in a Circle **Problem 12:** Find the **\( m \angle DE \)**. **Diagram Description:** - The image features a circle with three points marked on its circumference: \( F \), \( D \), and \( E \). - There are three angles formed by lines drawn from these points to the center of the circle: - The angle \( \angle ADF \) measures **93°**. - The angle \( \angle ADE \) measures **124°**. - You are asked to find the measure of \( m \angle DE \). **Approach to Solution:** - Knowing the sum of angles in a circle is 360°, you can calculate the missing angle. **Step-by-Step Solution:** 1. Total sum of angles in a circle = 360°. 2. Known angles: - \( \angle ADF = 93° \) - \( \angle ADE = 124° \) 3. Sum of the given angles: \( 93° + 124° = 217° \). 4. Determine the measure of \( \angle DE \): - \( 360° - 217° = 143° \). **Answer:** The measure of \( m \angle DE \) is **143°**. #### Your Answer: (Place for users to submit their answer)
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Points, Lines and Planes
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, geometry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
Geometry
ISBN:
9781337614085
Author:
Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:
Cengage,
Elementary Geometry for College Students
Elementary Geometry for College Students
Geometry
ISBN:
9781285195698
Author:
Daniel C. Alexander, Geralyn M. Koeberlein
Publisher:
Cengage Learning