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A transformation in which a figure slides but does not turn.

When a figure is translated it is congruent because the shape and angles do not change size.

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A transformation in which a figure flips across the line of reflection.

Line of Reflection: Line in between the image and the original of the shape that was reflected.

When a figure is rotated it is congruent because the shape and angles do not change size.

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A transformation in which a figure turns around a point called the center of rotation.

Angle of rotation: The number of degrees that a rotation turns.

Is it congruent because it does not change size, it just changes location.

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A dilation is a translation that makes a figure larger or smaller with respect to a point called the center of dilation.

Types of Dilations

Enlargement

Enlargement has a scale factor bigger than one and gets bigger.

Reduction

Reduction has a scale factor that is less than one but above zero and gets smaller.

The image and original would be considered similar images because the size either gets bigger or smaller.

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Math Shorts Episode 14 - Understanding Dilations