# Translation and Reflection

- Author:
- Ms. Rabasca

- Topic:
- Geometry, Reflection, Translation

## Wednesday Practice Lesson

Today, you should spend 35 minutes practicing translations and reflections on geogebra. If the lesson is taking you much longer than 35 minutes, you can make a comment on google classroom to let me know how far you got. To let me know you are finished, make sure you click "submit" on the google classroom assignment.

## Geogebra Drawing Tools

## Use some of the tools I discussed in the tutorial to draw a picture in the space below. Use at least one point, line, line segment, polygon, and vector in your drawing. Feel free to explore other tools to help you draw!

## Translation

Next, we'll work on translating shapes. Watch the video on using the "translate" tool in geogebra, then practice translating in the applet.

## Using "Translate By Vector" in Geogebra

## Use the "Translate by Vector" feature to translate points A, B, and C. into the box. Translate them by the directed line segment from DE.

## Look at the translation from ABC to A'B'C' and then answer the questions below.

## Look at the image above.

1) What vector was use to translate ABC to A'B'C'? 2) What would happen if we translated the triangle by vector m and then by vector v?

## Reflection Tool Tutorial

## Practice reflecting shapes over the lines below. Reflect the diamond until you have a copy in all 4 quadrants.

## Use the "translate by vector" and "reflect over line" to show each transformation described below. Use the style bar (top right) to choose a different color for each one.

1) Translate figure S along the vector v. Color this image green.
2) Reflect the figure S across line y. Color this image blue.
3) Reflect figure s across line m. Color this image purple.
4) Translate figure S along the directed line segment w. Then reflect the image across the line y. Color this image pink.

## Look at the images you created in the last activity.

1) How are the images different? 2) How are they the same?