hello, Im a student in the 10th grade. I was wondering why K is used as the dilation constant for transformation geometry? thanks very much!

Molly

There is no notation that is accepted by everybody. In mathematics the letter k often is used to represent an arbitrary constant since it sounds like the first letter of "constant", while "c" is used for many other tasks and usually is not available. I have not seen "capital K" used for the dilation constant, but there is nothing wrong with it. (By the way, although the word "dilation" is often found in textbooks, careful scholars prefer to call this transformation a "dilatation".)