Two angles (a + 31) and (b - 49o) are adjacent angles on a straight line. Which of the following is true
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Correct Answer: Option A
Explanation:
a + 31 + b - 49 = 180o(sum of angles on str line)
a + b - 18 = 180o
a + b = 180 + 18
a + b = 198o
a + 31 + b - 49 = 180o(sum of angles on str line)
a + b - 18 = 180o
a + b = 180 + 18
a + b = 198o