Answer: 
 and
 and 
 
 
 
Step-by-step explanation: 
Given 
See attachment for the triangles 
 
Required 
Which additional statement proves the similarity of both triangles 
 
From the attachment:
 
 
 
The similar sides of both triangles are: ST and XY 
 
So: 
 
 
 
 
 
Divide by 9 
 
 
 
Another similar sides are: TW and YZ 
So: 
 
 
 
Equate both ratios: 
 
 
 
Represent as fraction 
 
 
 
 
Multiply both sides by 8 
 
 
 
 
 
 
 
Another similar sides are: SW and XZ 
So: 
 
 
 
Equate both ratios: 
 
 
 
Represent as fraction 
 
 
 
 
Multiply both sides by 5 
 
 
 
 
 
 
 
So, the statement that proves the similarity of the triangles is: 
 and
 and 
