alleryStart learning →Two lines cross. One angle is 3x degrees and the angle opposite it is (x + 40) degrees. What is the angle?
A40°
B60°
C80°
D120°
Answer & Solution
Correct answer: B. 60°
Opposite angles are equal, so 3x equals x plus 40, giving x as 20 and the angle as 60 degrees.
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