Question

When two straight lines intersect:
Adjacent angles are complementary
Adjacent angles are supplementary.
Opposite angles are equal.
Opposite angles are supplementary.
Of these statements

Answer 1

When two straight lines intersect:  Adjacent angles are supplementary and Opposite angles are equal.

• Option (2) Adjacent angles are supplementary.
• The adjacent angles form a linear pair or the sum of angles formed equals 180 degrees when two straight lines intersect.
• Option (3) Opposite angles are equal.
• As the vertically opposite angles are equal, thus the opposite angles are equal when two straight lines intersect.