Lecture on Similar Shapes

Principle objective of this lecture is to present on Similar Shapes. Similar figures are identical in shape, but not in size.  For example, two circles are always similar. Two squares are always similar. And two rectangles could be similar. Two shapes are Similar when the only difference is size (and possibly the need to move, turn or flip one around). If one shape can become another using Resizing (also called dilation, contraction, compression, enlargement or even expansion), then the shapes are Similar.