Translations and Reflections

Front

What is a reflection?

Back

When you flip or mirror an object across a line.

Front

Reflections over the x-axis change the ____-__________.

Back

y-coordinate

Front

If triangle GHI is reflected across the x-axis, what happens to the coordinates of point I?

Back

The y-coordinate of point I changes sign.

Front

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

Back

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

Front

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

Back

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

Front

If the dotted figure is the image, the original figure was reflected over the ...

Back

x-axis.

Front

Reflect the image over the y-axis. Which quadrants will the image be located in?

Back

Quadrant II and III.

Front

What is the line of reflection?

Back

The line across which a figure is flipped to create a mirror image.

Front

How do you determine the coordinates of a reflected point?

Back

By changing the sign of the appropriate coordinate based on the line of reflection.

Front

What happens to the x-coordinates of points reflected over the y-axis?

Back

The x-coordinates change sign.