This lesson involves reflections in the coordinate plane. We use coordinate rules as well as matrix multiplication to reflect a polygon (or polygon matrix) about the x-axis, y-axis, the line y = x or the line y = -x. Reference Section 9.3 in the McDougal-Littell Geometry Textbook.
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Each video in this series is designed to accompany a specific chapter in the McDougal-Littel Geometry text book for high school geometry.