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
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Question

Transcribed Image Text:**Educational Content: Understanding Transformations in Geometry**
**Problem Description**:
You are given triangle LMN with the following vertices:
- L(2, 7)
- M(8, 8)
- N(2, 1)
Apply the transformation \( R_{y-axis} \circ T_{<-4,-5>} \) to the triangle and determine the new coordinates of point N', the image of point N after the transformation.
**Transformation Explanation**:
1. **Translation \( T_{<-4,-5>} \)**:
- Move each point of the triangle left by 4 units and down by 5 units.
- For point N(2, 1):
- New x-coordinate: \( 2 - 4 = -2 \)
- New y-coordinate: \( 1 - 5 = -4 \)
- Resulting point after translation: N'(-2, -4)
2. **Reflection Across the Y-axis \( R_{y-axis} \)**:
- Reflect the point over the y-axis, meaning the x-coordinate changes sign while the y-coordinate remains the same.
- For point N'(-2, -4) after translation:
- Reflected x-coordinate: \( -(-2) = 2 \)
- Y-coordinate remains: -4
- Resulting point after reflection: N'(2, -4)
**Solution**:
- The coordinates of N' after the transformations are (2, -4).
**Important Concepts**:
- **Translation** involves moving every point of a shape a certain distance in a specific direction.
- **Reflection** is flipping a shape over a line, such as the y-axis, which changes the sign of the x-coordinate but keeps the y-coordinate the same.
By understanding these transformations, you can accurately determine the new positions of geometric figures on the coordinate plane.
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