Proving Figures Are Congruent Using Rigid Motions

The original figure prior to a transformation.

• Pre-image
• Image

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CCSS.HSG.CO.A.2

The result of a transformation.

• Pre-image
• Image

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CCSS.HSG.CO.A.2

If the dotted figure is the image, the original figure was reflected over the ...

• x-axis
• y-axis

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Another name for Reflection is...

• flip
• turn
• slide
• dilation

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

True or false: A reflection makes a congruent figure. 

• true
• false

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

A slide is also called a _________.

• Translation
• Reflection
• Rotation
• Transformation

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Identify the transformation from C to D.

• 90^o Counter Clockwise Rotation
• 180^o Rotation
• 270^o Counter clockwise Rotation
• 360^o Rotation

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What does a translation do to an image?

• Turns it 90* clockwise
• Mirrors it
• Shrinks it
• Slides it

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which answer shows a reflection across the y-axis?

• a
• b
• c
• d

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

A type of transformation where a figure is “flipped” over a line of symmetry. A reflection produces a mirror image of a figure.

• rotation
• translation
• dilation
• reflection

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5