8th Grade Math Unit 7 Review -Transformations

Front

What is a transformation in geometry?

Back

A transformation is a change in the position, size, or shape of a figure.

Front

What does a translation do to a figure?

Back

A translation moves a figure from one location to another without changing its shape, size, or orientation.

Front

How do you represent a translation of a figure 3 units left and 4 units up algebraically?

Back

(x, y) → (x - 3, y + 4)

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What does the notation (x, y) → (x, -y) represent?

Back

It represents a reflection over the x-axis.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a figure around a fixed point at a certain angle.

Front

What does the notation (x, y) → (-y, x) represent?

Back

It represents a rotation of 90 degrees counterclockwise.

Front

What is dilation in geometry?

Back

Dilation is a transformation that changes the size of a figure but not its shape, using a scale factor.

Front

What does a scale factor greater than 1 indicate in dilation?

Back

It indicates that the figure is enlarged.

Front

What does a scale factor less than 1 indicate in dilation?

Back

It indicates that the figure is reduced.