A reflection maps a point or figure in the coordinate plane to its mirror image using a specific line as its line of reflection. In this book, the lines of reflection are
across x-axis | across y-axis | across
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across
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Reflect the quadrilateral with vertices A(2, 1), B(8, 1), C(8, 4), and D(5, 5) across the indicated line. What are the vertices of the image? Graph the preimage and the image in the same coordinate plane.
y-axis
Does it matter what order you list the points in the preimage matrix?
Yes; you should list them in order as you move around the outside of the figure.
The vertices of the image are
The vertices of the image are