Hi there!
For number 13, it’ll be matching 11 and 12 since all of those are an X shape size.
For number 14, it would be just 9.
For number 15, it is 7 and 8 since it is all like a shape of 2 lines.
Number 10 would be number cause it’s not a parallel line, intersecting line, or a perpendicular line.
