Answer:
Assuming that the two triangles are the same, R = N and W = P which makes it C, or 12 degrees.
Step-by-step explanation:
To find the missing angle, you need to find the missing number in 180. Every triangle is equal to 180 degrees.
So you do 180 - 90 (The right angle) - 78 (the known angle of R and N)
This gives you 12 degrees.
Add it all back together to check it and make sure it equals 180 degrees, and your answer is indeed 12.
