Q8 of 20 Page 101

An angle is greater than 45o. Is its complementary angle greater than 45o or equal to 45o or less than 45o?

Let us assume two angles x and y


Now,


x and y are two angles making a complementary angle pair and x is greater 45o


Therefore,


x + y = 90o


y = 90o – xo


Hence,


Angle y will be lesser than 45o

More from this chapter

All 20 →
6

In the given figure, ∠1 and ∠2 are supplementary angles. If ∠1 is decreased, what

changes should take place in ∠2 so that both the angles still remain supplementary.


 7

Can two angles be supplementary if both of them are:

(i) Acute


(ii) Obtuse


(iii) Right?

 9

In the figure given below:


(i) Is ∠1 adjacent to ∠2?


(ii) Is ∠AOC adjacent to ∠AOE?


(iii) Do ∠COE and ∠EOD form a linear pair?


(iv) Are ∠BOD and ∠DOA supplementary?


(v) Is ∠1 vertically opposite to ∠2?


(vi) What is the vertically opposite angle of ∠5?

 10

Indicate which pairs of angles are:


(i) Vertically opposite angles.


(ii) Linear pairs.