C. A reflection across the line containing ZK
The answer would have to be 4
A positive + A positive = A positive (1+2=3)
A negative + A negative = A negative (-1+(-2)=-3)
Adding a negative is like subtracting a positive (1 + (-2) = -1) this is equal to (1 - 2 = -1)
Adding a positive is like subtracting a negative (-1 + 2 = 1)
B. I do know if it’s a triangle but 180 degrees is what you need to get to so 104+76=180
