Answer:
Step-by-step explanation:
All triangles have 180 as the sum of the 3 interior angles.
x + 74 + 55 + 54 = 180 Combine
x + 183 = 180 Subtract 183 from both sides.
x = 180 - 183 Combine
x = - 3
You probably have been told that there is no such thing as a minus angle, and that's true. The angle isn't minus. Just x is. The size of the angle is
Angle size = 74 - 3 = 71
Now try adding them together
55 + 54 + 71 = 180 which is what it should come to
