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
Related questions
Question

Transcribed Image Text:**Transcription for Educational Website**
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**Title: Understanding Graphical Transformations**
**Introduction:**
Consider the figures shown on the graph.
**Description and Analysis:**
The graph displays two triangular figures plotted on a coordinate plane. The plane is divided into four quadrants by the x-axis and y-axis. The figures are identified by their vertices:
1. **Triangle ABC** (in the second quadrant):
- **Vertex A** is located at point (-4, -2).
- **Vertex B** is positioned at point (-3, -2).
- **Vertex C** is at point (-3, -5).
This triangle seems to be a right-angled triangle with a horizontal base along the line joining vertices A and B. The vertex C is positioned below this line, forming a vertical leg.
2. **Triangle DEF** (in the fourth quadrant):
- **Vertex D** is at point (2, -2).
- **Vertex E** is at point (4, -2).
- **Vertex F** is at point (4, -5).
Similar to the first triangle, this triangle is also right-angled, with a horizontal base from D to E, and a vertical side dropping down to F.
**Transformation Insight:**
Observing the positions and orientation of the triangles:
- Triangle DEF appears to be a translation of Triangle ABC to the right along the x-axis and mirrored across the y-axis, indicating a possible reflection over the y-axis and further translation.
**Conclusion:**
The graphical representation effectively illustrates geometric transformations including translation and reflection. Understanding such transformations is fundamental in the study of coordinate geometry and spatial reasoning.
---

Transcribed Image Text:**Reflection and Equation Mapping in Geometry**
In this problem, you are asked to determine the line of reflection that maps triangle \( \triangle ABC \) onto triangle \( \triangle EDF \). A line of reflection is a line that acts as a mirror, providing a way to transform one shape into another identical shape.
### Question:
Which equation represents the line of reflection that maps \( \triangle ABC \) onto \( \triangle EDF \)?
- \( y = -2 \)
- \( y = -3 \)
- \( y = 2x - 3 \)
- \( y = -2x - 2 \)
To solve this problem, identify which line acts as a mirror between the two triangles by verifying each equation as a potential line of reflection.
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