Any idea on how to do this? I'm a little confused.

Answer is 12.

Step-by-step explanation:

If UW is 16, and VW is 4, then just do 16-4 to get 12.

Hope this helps.

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.