Answer: 55°
explanation: all angles in a triangle must add up to 180°. Create an equation and solve for x:
x + 50° + 75° = 180°
x = 55°
Answer:

Step-by-step explanation:
Given


Required

This is already stated in the question as:

5' per side or whatever units it's measured in, because 4x5=20
You find the overall change in temperature by adding them together.
-8 would be from were is decreased 8 degrees and +8 would be from where it increased 8 degrees
Like: -8+8=0