CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade VII - The Triangle and its Properties
Question 1
1.
    • The altitude corresponding to the side
    •  

      NO
       
       
  •  

    NR
     
     
  •  

    NO
     
     
  •  

    PS
     
     
  •  

    OR
     
     
  •  

    NQ
     
     
Question 2
2.
In a right-angled triangle if one of the acute angles is 27°, find the measure of the other acute angle.
  • 64°
  • 62°
  • 65°
  • 63°
  • 61°
Question 3
3.
In the following figure, two sides of a triangle have been produced. Find all the angles of the triangle.
  • x
    =
    28°
    ,
    y
    =
    70°
    ,
    z
    =
    82°
  • x
    =
    28°
    ,
    y
    =
    72°
    ,
    z
    =
    80°
  • x
    =
    30°
    ,
    y
    =
    68°
    ,
    z
    =
    82°
  • x
    =
    30°
    ,
    y
    =
    70°
    ,
    z
    =
    80°
  • x
    =
    32°
    ,
    y
    =
    70°
    ,
    z
    =
    78°
Question 4
4.
Find the measures of the three sides suitable to form a triangle?
  • BC = 6 cm , CD = 15 cm , DB = 7 cm
  • BC = 17 cm , CD = 9 cm , DB = 6 cm
  • BC = 10 cm , CD = 12 cm , DB = 12 cm
  • BC = 10 cm , CD = 6 cm , DB = 17 cm
  • BC = 7 cm , CD = 8 cm , DB = 20 cm
Question 5
5.
Which of the following are measures of an equilateral triangle ?
  • IJ = 15 cm , JK = 14 cm , KI = 10 cm
  • IJ = 10 cm , JK = 11 cm , KI = 14.87 cm
  • IJ = 13 cm , JK = 13 cm , KI = 18.38 cm
  • IJ = 12 cm , JK = 13 cm , KI = 12 cm
  • IJ = 14 cm , JK = 14 cm , KI = 14 cm
Question 6
6.
Which of the following are measures of an acute angled triangle ?
  • ∠P = 91.04° , ∠Q = 47.16° , ∠R = 41.8°
  • ∠P = 41.85° , ∠Q = 69.07° , ∠R = 69.08°
  • ∠P = 52.43° , ∠Q = 90° , ∠R = 37.57°
  • ∠P = 120.25° , ∠Q = 34.16° , ∠R = 25.59°
  • ∠P = 45° , ∠Q = 90° , ∠R = 45°
Question 7
7.
Find the unknown marked angle in the following figure
  • x
    =
    69.8°
  • x
    =
    68.8°
  • x
    =
    67.8°
  • x
    =
    66.8°
  • x
    =
    70.8°
Question 8
8.
    • The angles of the triangle are
  • ∠E , ∠F , ∠H
  • ∠D , ∠E , ∠G
  • ∠D , ∠E , ∠F
  • ∠E , ∠F , ∠G
  • ∠F , ∠G , ∠H
Question 9
9.
    • Find the unknown angles in the following figure
  • C
    =
    38°
    ,
    D
    =
    38°
  • C
    =
    39°
    ,
    D
    =
    39°
  • C
    =
    35°
    ,
    D
    =
    35°
  • C
    =
    36°
    ,
    D
    =
    36°
  • C
    =
    37°
    ,
    D
    =
    37°
Question 10
10.
In the following figure, one side of a triangle has been produced. Find the values of x and y.
  • x
    =
    45°
    ,
    y
    =
    99°
  • x
    =
    43°
    ,
    y
    =
    97°
  • x
    =
    44°
    ,
    y
    =
    98°
  • x
    =
    46°
    ,
    y
    =
    100°
  • x
    =
    47°
    ,
    y
    =
    101°