Exercise 4.5

1. Draw the following pairs of angles as adjacent angles. Check whether they form linear pair.

(i)

Solution:

(ii)

Solution:

(iii)

Solution:

DonotDo form Linear pair

2. Niharika took two angles - 130° and 50° and tried to check whether they form a linear pair. She made the following picture.

Can we say that these two angles do not form a linear pair? If not, what is Niharika's mistake?

Solution:

NoYes

Because there is no common arm.