Question

Que. 4 Define:
(a) linear pair of angles,
(b) vertically opposite
angles.​

Answer 1

Answer:

a, linear pair is a pair of adjacent angles formed when two lines intersect. In the figure, ∠1 and ∠2 form a linear pair. So do ∠2 and ∠3 , ∠3 and ∠4 , and ∠1 and ∠4 .

b,Vertical angles are pair angles formed when two lines intersect. Vertical angles are sometimes referred to as vertically opposite angles because the angles are opposite to each other. Real-life settings where vertical angles are used include; railroad crossing sign, letter “X'', open scissors pliers etc.

Answer 2

Answer:

LINEAR PAIR OF ANGLES - DEFINITION

Two angles are said to be in a linear pair if they are adjacent to each other, lie on the same side of the line and the sum of their measures is 180°

VERTICALLY OPPOSITE ANGLES - DEFINITION

Vertically opposite angles are the angles formed opposite to each other when two lines intersect.