They are hidden in the corner of you're brain. Get creative and they will pop out :) it has happen to me before
Well, it was something that the Tigris and Euphrates River dumped to, and was also called that because it was shaped like a crescent. it was I think egyptians used.
Answer:
A vectorizing represent an image using lines to construct the outlines of objects.
Explanation:
Vectorization or tracing is the process of taking a bitmap image and re-drawing it as a vector image. The shapes in vector images allow computers to do things that cannot be done with bitmap images, like scale them to any size without loss of quality and using them to e.g. cut, sew, paint, and laser engrave.