Length and scale factor

This task is about length and scale factor under enlargement.
Ben was designing his own Christmas wrapping paper. He enlarged his original drawings on to the wrapping paper. For each shape he drew, find
  1. the scale factor of the enlargement, and
  2. the length of the marked side.

Question 1Change answer

Original Drawing Enlarged Drawing  
christmas tree
enlarged christmas tree
 
 
scale factor = 
 
 
length of w =  mm

Question 1Change answer

Original Drawing Enlarged Drawing  
present-a.png
present-b.png
scale factor = 
 
 
length of y =  mm

Question 1Change answer

Original Drawing Enlarged Drawing  
candle-a.png
candle-b.png
scale factor = 
 
 
length of z =  mm

Question 1Change answer

Original Drawing Enlarged Drawing  
ball-jar-a.png
ball-jar-b.png
 
scale factor = 
 
 
length of x =  mm