If m || n, which statement is true?

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
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The question presented is: "If line \( m \parallel n \), which statement is true?"

The image shows two parallel lines, \( m \) and \( n \), cut by a transversal. The transversal intersects lines \( m \) and \( n \), creating various angles labeled as \( a, b, c, d, e, f, \) and \( g \). One of these angles is marked with a measure of \( 121^\circ \).

### Diagram Explanation:

- **Lines \( m \) and \( n \)**: These are parallel lines, indicated by the notation \( m \parallel n \).
- **Transversal**: A line that crosses both parallel lines, forming several angles at the points of intersection.
- **Angles**:
  - **\( a, b, c, d, e, f, \) and \( g \)**: These angles are formed by the intersection of the transversal with lines \( m \) and \( n \).
  - **Angle \( d \)**: Specifically marked as \( 121^\circ \).

### Observations:
- Since lines \( m \) and \( n \) are parallel, the following pairs of angles are congruent:
  - Corresponding angles (e.g., \( a \) and \( c \), \( b \) and \( d \), etc.).
  - Alternate interior angles (e.g., \( f \) and \( d \)).
  - Alternate exterior angles.
  - Consecutive interior angles are supplementary (their sum is \( 180^\circ \)).

Given these relationships, the correct statement regarding the truth of the angle parameters can be inferred based on the properties of parallel lines and the transversal.
Transcribed Image Text:The question presented is: "If line \( m \parallel n \), which statement is true?" The image shows two parallel lines, \( m \) and \( n \), cut by a transversal. The transversal intersects lines \( m \) and \( n \), creating various angles labeled as \( a, b, c, d, e, f, \) and \( g \). One of these angles is marked with a measure of \( 121^\circ \). ### Diagram Explanation: - **Lines \( m \) and \( n \)**: These are parallel lines, indicated by the notation \( m \parallel n \). - **Transversal**: A line that crosses both parallel lines, forming several angles at the points of intersection. - **Angles**: - **\( a, b, c, d, e, f, \) and \( g \)**: These angles are formed by the intersection of the transversal with lines \( m \) and \( n \). - **Angle \( d \)**: Specifically marked as \( 121^\circ \). ### Observations: - Since lines \( m \) and \( n \) are parallel, the following pairs of angles are congruent: - Corresponding angles (e.g., \( a \) and \( c \), \( b \) and \( d \), etc.). - Alternate interior angles (e.g., \( f \) and \( d \)). - Alternate exterior angles. - Consecutive interior angles are supplementary (their sum is \( 180^\circ \)). Given these relationships, the correct statement regarding the truth of the angle parameters can be inferred based on the properties of parallel lines and the transversal.
The image shows a diagram of two intersecting lines, creating several angles labeled as follows: 

- The lines create angles a, b, c, d, e, f, and g.
- Angle c is given as 121°.
- The lines intersect at a common point forming a vertical angle pair and are extended to show each angle clearly.

Below the diagram, there are multiple-choice questions:

1. \( m \angle c = 59^\circ \)
2. \( m \angle e = 121^\circ \)
3. Vertical angles are supplementary
4. \( m \angle f = 121^\circ \) 

The correct answer seems to be identifying angle e as being vertically opposite to angle c, implying \( m \angle e = 121^\circ \).

In geometry, vertical angles are congruent, meaning angles directly across from each other when two lines intersect are equal in measure.
Transcribed Image Text:The image shows a diagram of two intersecting lines, creating several angles labeled as follows: - The lines create angles a, b, c, d, e, f, and g. - Angle c is given as 121°. - The lines intersect at a common point forming a vertical angle pair and are extended to show each angle clearly. Below the diagram, there are multiple-choice questions: 1. \( m \angle c = 59^\circ \) 2. \( m \angle e = 121^\circ \) 3. Vertical angles are supplementary 4. \( m \angle f = 121^\circ \) The correct answer seems to be identifying angle e as being vertically opposite to angle c, implying \( m \angle e = 121^\circ \). In geometry, vertical angles are congruent, meaning angles directly across from each other when two lines intersect are equal in measure.
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