Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter1: Line And Angle Relationships
Section1.2: Angles And Their Relationships
Problem 37E: Draw a triangle with three acute angles. Construct angle bisectors for each of the three angles. On...
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![**Example Problem: Naming Angles in a Triangle**
**Problem Statement:**
Name the marked angle in 2 different ways.
**Diagram Explanation:**
The diagram shows a right triangle labeled \( \triangle CDE \).
- **Vertices**: The vertices of the triangle are labeled as \(C\), \(D\), and \(E\).
- **Right Angle**: The right angle is located at vertex \(C\), meaning \( \angle ECD = 90^\circ\).
- **Marked Angle**: The marked angle is located at vertex \(E\).
**Steps to Name the Marked Angle:**
1. **Using Three Letters**: Start from one vertex, move to the marked vertex, and end at the third vertex. Here, the marked angle can be named using the vertices:
\[ \angle ECD \text{ or } \angle DCE \]
2. **Using One Letter**: Another common way to name an angle is by using just the vertex of the angle. In this case, the marked angle at \(E\) can be simply named:
\[ \angle E \]
**Answer Box:**
- First way:
\[ \angle ECD \]
- Second way:
\[ \angle DCE \]
Fill these names in the provided answer boxes and click "Submit Answer" to check your solution.
(Note: The online platform interface displayed contains text boxes for inputs and a 'Submit Answer' button at the bottom.)
**Conclusion:**
This exercise helps in understanding how to denote angles using different naming conventions in geometric figures.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ddc3929-1beb-4dd6-a443-39e9bbd8ad94%2Fc1d829ee-3b4b-451f-95fd-821993539d2d%2F85eubfn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Example Problem: Naming Angles in a Triangle**
**Problem Statement:**
Name the marked angle in 2 different ways.
**Diagram Explanation:**
The diagram shows a right triangle labeled \( \triangle CDE \).
- **Vertices**: The vertices of the triangle are labeled as \(C\), \(D\), and \(E\).
- **Right Angle**: The right angle is located at vertex \(C\), meaning \( \angle ECD = 90^\circ\).
- **Marked Angle**: The marked angle is located at vertex \(E\).
**Steps to Name the Marked Angle:**
1. **Using Three Letters**: Start from one vertex, move to the marked vertex, and end at the third vertex. Here, the marked angle can be named using the vertices:
\[ \angle ECD \text{ or } \angle DCE \]
2. **Using One Letter**: Another common way to name an angle is by using just the vertex of the angle. In this case, the marked angle at \(E\) can be simply named:
\[ \angle E \]
**Answer Box:**
- First way:
\[ \angle ECD \]
- Second way:
\[ \angle DCE \]
Fill these names in the provided answer boxes and click "Submit Answer" to check your solution.
(Note: The online platform interface displayed contains text boxes for inputs and a 'Submit Answer' button at the bottom.)
**Conclusion:**
This exercise helps in understanding how to denote angles using different naming conventions in geometric figures.
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