Reflections Rotations Translations and Dilations of Points

Tell whether each transformation is a dilation. Explain.

• No, scale factor isn't the same.

• Yes, scale factor is the same

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

What type of transformation is pictured here?

• Translation

• Reflection

• Rotation

• Dilation

• None of the above

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What does it mean to rotate a shape?

• To make a shape bigger, or smaller.

• To turn, or spin, a shape.

• To move a shape up, down, left, and right.

• To flip a shape.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What does it mean to reflect a shape?

• To make a shape bigger or smaller.

• To turn, or spin, a shape.

• To move a shape up, down, left, and right.

• To flip a shape.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What type of transformation is pictured here?

• Translation

• Reflection

• Rotation

• Dilation

• None of these

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Ms. Pandrea claims that the pre-image is the triangle under the x-axis. Is she correct? Explain.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Ms. Pandrea claims the post-image is the darker shaded triangle (towards the top of the graph). Is she correct? Explain.

Tags

CCSS.HSG.CO.A.2

How do we define movement in Math?

• By describing Translations

• By describing Rotations

• By describing Reflections

• By describing Transformations

• By describing Dilations

Tags

CCSS.HSG.CO.A.2

This transformation takes a figure across a line and moves every point on the figure to a point directly on the opposite side of the line. The new point is the same distance from the line as it was in the original figure.

Answer explanation

A reflection across a line moves every point on a figure to a point directly on the opposite side of the line. The new point is the same distance from the line as it was in the original figure.

This diagram shows a reflection of A over line l that makes the mirror image B.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

A fixed point on a plane, and the starting point from which we measure distances in a dilation.

• center of dilation

• translation

• rigid transformation

• line of reflection

Answer explanation

The center of a dilation is a fixed point on a plane. It is the starting point from which we measure distances in a dilation.

In this diagram, point P is the center of the dilation.

Tags

CCSS.8.G.A.3