Describing Line Reflections

1. Describing Line Reflections

2. Line Reflection • How do we draw a reflection of this image? • What rules do we use to judge that we did it correctly? • Same size, same shape (congruent) • Each point is the same distance from the line of reflection. • If you draw a line from point A to the new point a (written as A’), it would be perpendicular to the line of reflection.

3. Line Reflection • The new image has the same letters but with an apostrophe after them. • We read A’ as “A prime” • We read B’ as “B prime” • We read C’ as “C prime”

4. Transformations • Drawing the reflection image of a figure is one kind of transformation. • A transformation is a geometric operation that acts on the original figure and produces a copy of the figure in a new position. • We call the copy the image of the original figure.

5. Tell whether the following is a reflection. If it is not, tell why.

6. Tell whether the following is a reflection. If it is not, tell why.

7. Tell whether the following is a reflection. If it is not, tell why.

8. Tell whether the following is a reflection. If it is not, tell why.

9. Tell whether the following is a reflection. If it is not, tell why.

10. Tell whether the following is a reflection. If it is not, tell why.

11. Tell whether the following is a reflection. If it is not, tell why.

12. Tell whether the following is a reflection. If it is not, tell why.

13. Time to practice Drawing Reflections 