# Reflecting Polygons Over the Axes

- Author:
- Abigail McCann, Ben Dougherty

- Topic:
- Polygons

## Predict where the image points will be located when this polygon is reflected over each axis.

## Imagine polygon ABCDE is reflected over the y axis:

Which coordinates in its points will be preserved and which will flip signs?

If polygon ABCDE is reflected over the y axis, what will be the coordinates for A'?

## Imagine polygon ABCDE is reflected over the x axis:

Which coordinates in its points will be preserved and which will flip signs?

If ABCDE is reflected over the x axis, what will be the coordinates for B'?

## Now try it out! Click the boxes to reflect the polygon over the x and y axes. Use the image that is produced to answer the questions.

Were the predictions you made in the section above right? Explain how you know:

Does reflection change the distance between the points in the image?

Does reflection change the size of the shape?

What are the coordinates of D' when polygon ABCDE is reflected over the x axis?

After ABCDE is reflected over the y axis, how does the distance from point B to the y axis compare to the distance from B' to the y axis.