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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Transcribed Image Text:### Reflection of Quadrilateral ABCD Across the x-axis
In this exercise, you are required to plot the image of quadrilateral \(ABCD\) under a reflection across the \(x\)-axis. The initial quadrilateral \(ABCD\) is displayed on a coordinate plane with points \(A\), \(B\), \(C\), and \(D\) being clearly marked.
#### Explanation of the Initial Quadrilateral
1. **Quadrilateral ABCD:**
- \(A(2, 4)\)
- \(B(-4, 3)\)
- \(C(-3, -6)\)
- \(D(0, -3)\)
2. **Coordinate Plane Description:**
- The \(x\)-axis runs horizontally, and the \(y\)-axis runs vertically.
- Both axes are labeled with positive and negative values, and a grid with a scale from -7 to 7 on both axes is provided to assist with plotting coordinates accurately.
#### Reflection Process
When reflecting a point across the \(x\)-axis, the \(x\)-coordinate remains the same, while the \(y\)-coordinate is multiplied by \(-1\).
**Reflection of Points:**
- Point \(A(2, 4)\) reflects to \(A'(2, -4)\)
- Point \(B(-4, 3)\) reflects to \(B'(-4, -3)\)
- Point \(C(-3, -6)\) reflects to \(C'(-3, 6)\)
- Point \(D(0, -3)\) reflects to \(D'(0, 3)\)
#### Graphical Representation
The diagram on the coordinate plane showcases:
1. **Original Quadrilateral \(ABCD\):**
- Is displayed in blue.
- Points \(A\), \(B\), \(C\), and \(D\) plotted at their respective coordinates.
2. **Reflected Quadrilateral \(A'B'C'D'\):**
- Would be displayed with its points mirrored across the \(x\)-axis.
- Points \(A'\), \(B'\), \(C'\), and \(D'\) should be plotted at their new reflected coordinates.
With all points plotted:
- The shape and size of the quadrilateral ABCD will remain the same after reflection, but its orientation will be flipped across the \(x\)-
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