Flip in Geometry

In geometry, a flip, also known as a reflection, is a mirror image of a geometric figure. For example, looking at the figure below, you could say that the shape on the left is a mirror image of the shape on the right and vise versa.

The dotted black line is the line of reflection. 

A Real-Life Example of a Flip

When you look at yourself in the mirror, what you see in the mirror is a flip.