Geometry Unit 4 Review

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 is the result of reflecting a point (x, y) over the x-axis?

Back

The result is (x, -y).

Front

What is the result of reflecting a point (x, y) over the line y = x?

Back

The result is (y, x).

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

If a point (x, y) is dilated with a scale factor of k, what are the new coordinates?

Back

The new coordinates are (kx, ky).

Front

What does a scale factor of 2.5 mean in dilation?

Back

It means that the new figure will be 2.5 times larger than the original figure.

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a figure the same distance in a specified direction.

Front

How do you translate a point (x, y) up by 3 and left by 1?

Back

The new coordinates will be (x - 1, y + 3).

Front

What is a 180° rotation in geometry?

Back

A 180° rotation turns a figure around a point, resulting in a figure that is upside down.

Front

What are the new coordinates of point (2, 6) after a 180° rotation around the origin?

Back

The new coordinates will be (-2, -6).