Answer:
C. 12
Explanation:
To change triangle PQR to XYZ you divide by 4. This can be seen in the change from 12 to 3 on the left side of the triangle. So, you divide 20 by 4 and get 5 and then divide 16 by 4 and get 4.
12/4=3
20/4=5
16/4=4
So, you add these values together to get the perimeter of 12.
I hope this helped!