Send a picture so i can answer it
Answer:
No, the polygons aren't similar since they don't have a constant scale factor.
Answer:

Step-by-step explanation:
Based off the typical rules of integers, expressions like these can be simplified to look different but mean the same thing.

In this case, we subtracted a negative value from a positive value; by doing this, we actually added positive 4.
Based on the same principals, adding a negative number is equivalent to subtraction!
Any time you see equations similar to this, you want to cancel out the 2 negative signs to make it positive!
Please look at the attached file for more information :)