Transformation STAAR Review

Front

What is a transformation in geometry?

Back

A transformation is a mathematical operation that moves or changes a shape in some way, including translations, rotations, reflections, and dilations.

Front

What is a dilation?

Back

A dilation is a transformation that changes the size of a figure but not its shape. It involves a scale factor that enlarges or reduces the figure.

Front

What is a translation?

Back

A translation is a transformation that slides a figure from one position to another without changing its size, shape, or orientation.

Front

What is a reflection?

Back

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

Front

What is the rule for reflecting a point over the x-axis?

Back

The rule for reflecting a point (x, y) over the x-axis is @@(x, y) ightarrow (x, -y)@@.

Front

What is the rule for translating a point 2 units to the right and 3 units down?

Back

The rule for translating a point (x, y) 2 units to the right and 3 units down is @@(x, y) ightarrow (x + 2, y - 3)@@.

Front

What is the pre-image in a transformation?

Back

The pre-image is the original figure before any transformation is applied.

Front

What is the image in a transformation?

Back

The image is the resulting figure after a transformation has been applied to the pre-image.

Front

What is the scale factor in a dilation?

Back

The scale factor is a number that describes how much a figure is enlarged or reduced during a dilation.

Front

How do you identify a translation in a set of transformations?

Back

A translation can be identified by the consistent movement of all points in a figure in the same direction and by the same distance.