CCSS.Math.Content.8.G.A.2

Did a rigid motion take place? If so, which type?

• No; the lengths of the triangle's sides changed
• Yes; a translation or slide
• Yes; a reflection over the y-axis
• Yes; a rotation about line MN

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CCSS.Math.Content.8.G.A.2

What additional information is needed to prove ⊿ABC ≅ ⊿DEC by the SAS Congruence Postulate?

• AB ≅  DE
• BC ≅  EC
• ∠A ≅ ∠D
• There is already enough information to prove the triangles congruent by the SAS Congruence Postulate.

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CCSS.Math.Content.8.G.A.2

The Point of rotation... 

• Is the point that does not move
• Move a little
• Is always the origin
• Is never the origin

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CCSS.Math.Content.8.G.A.2

Identify the transformation from A to D.

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

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CCSS.Math.Content.8.G.A.2

What is a reflection?

• When you turn an object around a point.
• When you slide an object form one place to another.
• When you flip or mirror an object across a line.
• When you resize an object.

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CCSS.Math.Content.8.G.A.2

A turn is also called a ___________.

• Translation
• Reflection
• Rotation
• Transformation

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CCSS.Math.Content.8.G.A.2

Definition: The figure before a transformation has occurred.

• image

• pre-image

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CCSS.Math.Content.8.G.A.2

Which transformation moves a geometric pre-image right, left, up or down?

• Translation

• Rotation

• Reflection

• Dilation

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CCSS.Math.Content.8.G.A.2

This is an example of a

• rotation

• translation

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CCSS.Math.Content.8.G.A.2

Identify the transformation of figure PQRSTU to figure P"Q"R"S"T"U"

• translation across the y-axis

• reflection across the x-axis

• reflection across the y-axis

• rotation 90˚ about the origin

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CCSS.Math.Content.8.G.A.2