Respuesta :

Answer:

The missing side is 12.

Step-by-step explanation:

To find the answer you want to divide the sides that are similar.

15/5=3

9/3=3

Both answers are three so you want to multiply 4 by 3 which equals 12.

Answer:

The missing side is 12.

Step-by-step explanation:

divide the sides that are similar.

15/5=39/3=3

Both answers are three so you want to multiply 4 by 3 which will equal 12.