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Railways PYQCBT 1 2016

RRB NTPC · Question 70

Consider the following statements & choose the correct option: When two straight lines intersect then, 1. Adjacent angles are supplementary 2. Opposite angles are supplementary

  1. Both 1 & 2 are incorrect.

  2. Both 1 & 2 are correct

  3. 1 is incorrect and 2 is correct

  4. 1 is correct and 2 is incorrect

Show answer & explanation

Answer: (D) 1 is correct and 2 is incorrect

Explanation

When two lines intersect, adjacent angles lie on a straight line, so they add to 180° (supplementary); statement 1 is correct. Vertically opposite angles are equal, not supplementary (unless both are 90°), so statement 2 is incorrect.