2. Fill in the blank. [5 points) a) ( Jare straight-sided shapes (3 or more sides), defined by three-dimensional points (vertices) and the straight lines that connect them ). The interior region of the polygon is called the b) ( ) is a technique for compositing two images or frames together in which a color (or a small color range) from one image is removed (made transparent), revealing another image behind it. c) In animation, ) is the technique to create a sequence of in-between values