CBSE Board Practice

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CBSE Grade IX - Lines and Angles

Question 1

1.	In the given figure, l ∥ m and n ∥ o and p ∥ q . Find the values of {e,f,g,h,i,j}
	56 ° , 51 ° , 73 ° , 51 ° , 56 ° , 73 ° 73 ° , 51 ° , 56 ° , 73 ° , 51 ° , 56 ° 56 ° , 51 ° , 51 ° , 56 ° , 73 ° , 73 ° 56 ° , 51 ° , 73 ° , 51 ° , 73 ° , 56 °

Question 2

2.	In the following figure, one side of a triangle has been produced. Find all the angles of the triangle
	L = 60° , M = 43° , N = 77° L = 58° , M = 45° , N = 77° L = 62° , M = 45° , N = 73° L = 58° , M = 47° , N = 75° L = 60° , M = 45° , N = 75°

Question 3

3.	In the given figure, △FGH in which side GH has been produced to I. If ∠HFG = x° , ∠FGH = (7/3a)° , ∠GHF = (4/3a)° and ∠FHI = (14/3a)°, find the values of a and x.
	a = 31° , x = 71° a = 29° , x = 69° a = 30° , x = 70° a = 32° , x = 72° a = 28° , x = 68°

Question 4

4.	The name of angle 4 in the given figure is
	∠UOP ∠POQ ∠ROS ∠SOT ∠TOU

Question 5

5.	The supplementary angle of 136° is
	44° 54° 74° 59° 49°

Question 6

6.	Which of the following are adjacent angles in the below figure?
	∠MQN , ∠NQO ∠OQM , ∠QQR ∠QQR , ∠NQO ∠PQQ , ∠NQO ∠NQO , ∠PQQ

Question 7

7.	The following angle represents
	obtuse angle complete angle right angle reflex angle acute angle

Question 8

8.	Calculate the value of x in the following figure
	x = 61.56° x = 59.56° x = 63.56° x = 60.56° x = 62.56°

Question 9

9.	In the given figure, find the values of x and y
	x = 57.94° , y = 48° x = 54.94° , y = 45° x = 55.94° , y = 46° x = 53.94° , y = 44° x = 56.94° , y = 47°

Question 10

10.	Find the interior alternate angles in the given figure
	∠3 , ∠6 ; ∠4 , ∠5 ∠3 , ∠5 ; ∠4 , ∠6 ∠3 , ∠4 , ∠5 , ∠6 ∠1 , ∠4 ; ∠2 , ∠3 ; ∠5 , ∠8 ; ∠6 , ∠7 ∠1 , ∠2 , ∠7 , ∠8

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