Answer:
the first one
Step-by-step explanation:
To solve this problem you use the Triangle Angle Sum Theorem concept. Which means all 3 angles of a triangle add up to 180° degrees.
The formula for this concept is:
a+b+c=180°
The answer is 0.56 the 6 is repeating
I don't how to exactly put the explanation in words I hope this helps you
3 to 9
9=18 divided by 2