The pieces of fabric are already the correct length, so it is just a matter of how many panels will fit into one piece of fabric. 2/(1/2) = 4, so she can make 4 panels from 1 piece of fabric.
I’m not sure of the context of your class, but the second choice will give you -21 and the third one will give you -15. The first and last choice are positive, so just between those two
The polygon is definitely a rectangle, and it could be a square.
The reciprocal of any number is the other number you must multiply it by to equal one. In this case it's 9/2
