Sum of all the interior angles = (5-2)x180 = 540°
540 - 100 - 120 - 100 - 90 = 130°
So the last unknown angle in the polygon is 130°
Sum of all the adjacent angles on a straight line is 180°
Angle 1 = 180 - 130 = 50°
100 would be correct because the 9 in the hundredths place rounds to a ten, and so does every other number.
Answer:
Hey
Step-by-step explanation:
I beleve you answer is 10 because 3 time 10 equals 30 and the question sais "3 times longer"