Q81 of 113 Page 128

If two angles have a common vertex and their arms form opposite rays (Fig. 5.41), Then,


A. how many angles are formed?


B. how many types of angles are formed?


C. write all the pairs of vertically opposite angles.

A. There are all total 13 angles.


B. The four types of angles formed are


● Vertically Opposite Angles.


● Linear Pair


● Adjacent Angles


● Supplementary angles


C. The Pair of vertically opposite angles are:


● ∠ 1 and ∠ 3


● ∠ 2 and ∠ 4


More from this chapter

All 113 →
79

In Fig. 5.39, P, Q and R are collinear points and TQ ⊥ PR,


Name; (a) pair of complementary angles


(b) two pairs of supplementary angles.


(c) four pairs of adjacent angles.

 80

In Fig. 5.40, OR ⊥ OP.


(i) Name all the pairs of adjacent angles.


(ii) Name all the pairs of complementary angles.

 82

In (Fig 5.42) are the following pairs of angles adjacent? Justify your answer.

 83

In Fig. 5.43, write all the pairs of supplementary angles.