What is another name for a square other than polygon

Another name for a square is a parallelogram which mean the sides  are parallel which mean is across from each other and not going into each other like a vertex which means the point for example the top of a rectangle is the vertex Hope this helps:)

2.1

Step-by-step explanation:

w/7 = .3

Multiply each side by 7

w/7 *7 = .3*7

w = 2.1