Basic geometry: how can you use a translation to find a missing vertex in a rectangle or square? . i know what a translation is, but i don't understand how the sliding of the figure will me to find missing vetex?

entering that problem on the tube might get you an answer

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.