Reflect the triangle on a graph (simple geomitry)?

Question

Graph the vertices of a triangle A(2,3) B(0,5) C(5,6)
Reflect the triangle about the line y=4; give coordinates of image
A= ( ) B= ( ) C= ( )

This is a REFLECTION of the previous image , what is the coordinates of the reflected imaged

Answer 1

The x's will all be the same, and the y's will be the difference between 4 & the number:

A=(2,5)
B=(0,3)
C=(5,2)

Another way to do this is to actually draw the triangle and the line y=4. This will give you a visual of what should happen.

Answer 2

For each point, leave x the same.
For the y-coordinate, calculate the distance between the point and the line y=4, and then apply that distance to the other side.
Example: A(2,3). y=3 is one below y=4, so you want to go one above it, to y=5. So A' is (2,5).