Warm Up Tell whether the shaded figure is a translation of the non-shaded figure. If it is a translation, use an arrow to represent the direction of the.

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Presentation transcript:

Warm Up Tell whether the shaded figure is a translation of the non-shaded figure. If it is a translation, use an arrow to represent the direction of the slide. 1. 2. 3. 4.

Reflections I can: Vocabulary: Define and identify reflections. Understand prime notation to describe an image after reflection. Identify lines of reflection. I can describe the changes occurring to the x and y coordinates of a figure after a reflection. Vocabulary: Reflections Line of Reflection Line of Symmetry

Reflection (Flip) A transformation representing a flip of a figure over a point, line, or plane.

A reflection creates a mirror image of the original figure. The original figure and its image are congruent.

Line of Reflection A line in which you reflect a figure over.

Line of Symmetry A line that can be drawn through a plane figure so that the figure on one side is the reflection image of the figure on the opposite side.

Reflection of Lines The size stays the same, the object is just the mirror image of itself.

Reflection of Angles The angle degree stays the same, the angle is just the mirror image of the original angle.

Horizontal flip: Vertical flip:

Reflection Click on this trapezoid to see reflection. The result of a figure flipped over a line.

Reflection Reflection

Reflection Reflection

Reflection Reflection

Why is this not perfect reflection? The zebras have slightly different striping. One has its nose closer to the ground.

Coordinate Plane A reflection across the y-axis RULE: (x, y)  (-x, y)

Coordinate Plane A reflection across the x-axis RULE: (x, y)  (x, -y)