Multiple Choice Question (MCQ)
In figure, if \overline{ABC} is a straight line , then x =
-
×
50
-
×
60
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✓
70
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×
80
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×
90
Answer
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For a triangle, an exterior angle of a triangle is equal to the sum of its two opposite non-adjacent interior angles.
In figure,
130\degree = x +(x-10 )
Therfore,
x = 70\degree