In this Grade 6 lesson from Reveal Math, Course 1, students learn how to graph reflections of points across the x-axis and y-axis on a coordinate plane. Students discover that reflecting a point across the x-axis keeps the x-coordinate the same while reversing the sign of the y-coordinate, and reflecting across the y-axis keeps the y-coordinate the same while reversing the sign of the x-coordinate. The lesson also covers prime notation for reflected points and how to identify the axis of reflection by comparing coordinate pairs.
Section 1
Defining Reflection and Line of Reflection
A reflection is a transformation that "flips" a point across a specific line to create a mirror image.
Section 2
Using Prime Notation for Reflected Points
When a point is reflected, the new point (the image) is labeled using the same letter as the original point (the pre-image) followed by a prime symbol ().
Original Point Reflected Point
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Section 1
Defining Reflection and Line of Reflection
A reflection is a transformation that "flips" a point across a specific line to create a mirror image.
Section 2
Using Prime Notation for Reflected Points
When a point is reflected, the new point (the image) is labeled using the same letter as the original point (the pre-image) followed by a prime symbol ().
Original Point Reflected Point
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter