Pre-Algebra Transformations Review

Front

What is a dilation in geometry?

Back

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

Front

What is a scale factor?

Back

The ratio of the length of a side of the image to the length of the corresponding side of the pre-image in a dilation.

Front

If a figure is translated 8 units left and 2 units up, what can we say about the pre-image and image?

Back

They are congruent; translations do not change the size or shape of a figure.

Front

What happens to the coordinates of a point (x, y) when it is reflected over the x-axis?

Back

The new coordinates will be (x, -y).

Front

If a figure is rotated 270 degrees clockwise, which quadrant will it be in if it started in Quadrant 1?

Back

It will be in Quadrant 3.

Front

What is the result of a 180-degree rotation of a point (x, y)?

Back

The new coordinates will be (-x, -y).

Front

What does it mean for two figures to be congruent?

Back

They have the same shape and size, but may be in different positions.

Front

How do you determine the new coordinates after a reflection over the y-axis?

Back

The new coordinates will be (-x, y).

Front

What is the effect of a translation on the size of a figure?

Back

A translation does not change the size or shape of a figure.

Front

If a figure is reflected over the x-axis, what happens to points in Quadrant 2?

Back

They will move to Quadrant 1.