# How to do a reflection in math

Reflections - Corbettmaths

Reflections review. Math Basic geometry Transformations, congruence, and similarity Reflections. So this is going to be our C here.

## Reflections: How to reflect a point

Now C prime would have the same X coordinate but instead of being four units below the X axis, it will be four units above the X axis. So let's make this right over here A, A prime. When you reflect a point across the x -axis, the x- coordinate remains the same, but the y -coordinate is transformed into its opposite its sign is changed. Imagine a straight line connecting A to A' where the origin is the midpoint of the segment.

Reflections in the coordinate plane: When we're talking about transformations, there are 4 different types one of which is a reflection. What this one does, it takes every x coordinate and then makes that into a y coordinate and does the same for your y coordinates, every y coordinate becomes an x coordinate so if we have a, our a since we have a prime and a double prime our a triple prime is going to be at 5, 3 so what I'm going to do is I'm going to write 3, 5 right here.