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Big Ideas Math Integrated I, 2016 View details

2. Reflections

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Exercise 3 Page 552

Each vertex must be moved to the opposite side of the line of reflection while maintaining the same distance from the line.

Practice makes perfect

Before we begin, let's add the given line of reflection to the graph of △ ABC.

To reflect the triangle in y=2, each vertex must be moved to the opposite side of the line of reflection while maintaining the same distance from the line. Note that the vertex at B is on the line of reflection so it will not move at all.