in Quantitative Aptitude edited by
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Consider the following statements :

When two straight lines intersect, then :

  1. adjacent angles are complementary
  2. adjacent angles are supplementary
  3. opposite angles are equal
  4. opposite angles are supplementary

Of these statements:

  1. (I) and (III) are correct
  2. (II) and (III) are correct
  3. (I) and (IV) are correct
  4. (II) and (IV) are correct
in Quantitative Aptitude edited by
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1 Answer

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Adjacent angle:

$\angle 1 + \angle 2 = 180^{\circ}$

$\angle 2 + \angle 3 = 180^{\circ}$

$\angle 3 + \angle 4 = 180^{\circ}$

$\angle 4 + \angle 1 = 180^{\circ}$

We can say that adjacent angle are supplementary.

So, the correct answer is $(B).$

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