CBSE Board Practice

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CBSE Grade IX - Lines and Angles
Question 1
1.
Find the interior angles in the given figure
  • ∠1 , ∠2 ; ∠2 , ∠4 ; ∠4 , ∠3 ; ∠3 , ∠1 ; ∠5 , ∠6 ; ∠6 , ∠8 ; ∠8 , ∠7 ; ∠7 , ∠5
  • ∠1 , ∠5 ; ∠2 , ∠6 ; ∠3 , ∠7 ; ∠4 , ∠8
  • ∠1 , ∠2 , ∠7 , ∠8
  • ∠3 , ∠4 , ∠5 , ∠6
  • ∠1 , ∠8 ; ∠2 , ∠7
Question 2
2.
In the given figure, calculate the value of x.
  • x
    =
    68.94°
  • x
    =
    65.94°
  • x
    =
    66.94°
  • x
    =
    64.94°
  • x
    =
    67.94°
Question 3
3.
If l ∥ m, which of the given figures is correct?
  • II
  • I
  • IV
  • III
Question 4
4.
Which of the following are true?
a)
If two lines are parallel to the same line, then they are parallel to each other
b)
    • If
    •  
    • o
    • ∥
    • p
    •  
    • and
    •  
    • p
    • ∥
    • q
    •  
    • , then
    •  
    • o
    • ∥
    • q
c)
If two lines are parallel to the same line, then they are perpendicular to each other
d)
    • If
    •  
    • o
    • ⟂
    • p
    •  
    • and
    •  
    • p
    • ⟂
    • q
    •  
    • , then
    •  
    • o
    • ⟂
    • q
e)
    • If
    •  
    • o
    • ⟂
    • p
    •  
    • and
    •  
    • o
    • ⟂
    • q
    •  
    • , then
    •  
    • p
    • ⟂
    • q
  • {c,a}
  • {a,b}
  • {e,c,a}
  • {d,b}
  • {d,b,a}
Question 5
5.
Which of the following are adjacent angles in the below figure?
  • ∠MQN , ∠NQO
  • ∠NQO , ∠PQQ
  • ∠OQM , ∠QQR
  • ∠QQR , ∠NQO
  • ∠PQQ , ∠NQO
Question 6
6.
Which of the given figures is wrong?
  • IV
  • I
  • II
  • III
Question 7
7.
Calculate the value of the lettered angle in the following figure
  • x
    =
    32.63°
  • x
    =
    29.63°
  • x
    =
    28.63°
  • x
    =
    30.63°
  • x
    =
    31.63°
Question 8
8.
In below given figure, find ∠IGK
  • 115.84°
  • 118.84°
  • 116.84°
  • 119.84°
  • 117.84°
Question 9
9.
Find the measures of the three angles suitable to form a triangle?
  • ∠C = 69.98° , ∠D = 61.28° , ∠E = 48.74°
  • ∠C = 31.20° , ∠D = 69.80° , ∠E = 98.90°
  • ∠C = 30.50° , ∠D = 37.40° , ∠E = 57.50°
  • ∠C = 60.30° , ∠D = 88.90° , ∠E = 77.30°
  • ∠C = 100.70° , ∠D = 114.20° , ∠E = 56.90°
Question 10
10.
Multiple lines which do not meet each other are called
  • concurrent lines
  • parallel lines
  • intersecting lines
  • coplanar lines
  • perpendicular lines