4.1 Exploring Reflections on the Coordinate Plane
Triangle ABC has been reflected over a line to form triangle A'B'C'.
Triangle ABC is the PRE-IMAGE while triangle A'B'C' is called the IMAGE.
Adjust triangle ABC and the line of reflection to see how triangle A'B'C' changes.
Reflections
When reflecting point A over a horizontal or vertical line, how do you know where point A' should be located?
When reflecting point A over a line with a slope of 1/1 or -1/1, how do you know where point A' should be located?
What do you notice about the line of reflection compared to the green dotted lines that connect a point to it's reflected point?