Step-by-step explanation:
step 1. x + 51 + 39 + 127 = 360 (1 revolution is 360°)
step 2. x + 90 + 127 = 360
step 3. x + 127 = 270. (subtract 90 on both sides)
step 4. x = 143° (subtract 127 on both sides)
A' = (-2, 1)
B' = (1, 0)
C' = (-1, 0)
Answer:
2.5
Step-by-step explanation: