ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade VI - Triangles
Question 1
1.
Which of the following are measures of a scalene triangle ?
  • NO = 15 cm , OP = 11 cm , PN = 14 cm
  • NO = 11 cm , OP = 15 cm , PN = 11 cm
  • NO = 13 cm , OP = 10 cm , PN = 13 cm
  • NO = 15 cm , OP = 15 cm , PN = 15 cm
  • NO = 14 cm , OP = 14 cm , PN = 19.8 cm
Question 2
2.
In a right angled triangle, if one of the angles is 47.12°, find the third angle
  • 52.88°
  • 72.88°
  • 57.88°
  • 42.88°
  • 47.88°
Question 3
3.
Which of the following are measures of an obtuse angled triangle ?
  • MN = 10 cm , NO = 12 cm , OM = 15.62 cm
  • MN = 10 cm , NO = 12 cm , OM = 11 cm
  • MN = 13 cm , NO = 13 cm , OM = 18.38 cm
  • MN = 12 cm , NO = 14 cm , OM = 15 cm
  • MN = 10 cm , NO = 19 cm , OM = 11 cm
Question 4
4.
Which of the following are measures of a right angled triangle ?
  • ∠P = 97.18° , ∠Q = 41.41° , ∠R = 41.41°
  • ∠P = 62.97° , ∠Q = 62.96° , ∠R = 54.07°
  • ∠P = 39.81° , ∠Q = 90° , ∠R = 50.19°
  • ∠P = 60° , ∠Q = 60° , ∠R = 60°
  • ∠P = 47.91° , ∠Q = 61.28° , ∠R = 70.81°
Question 5
5.
Calculate the value of x in the following figure
  • x
    =
    102.5°
  • x
    =
    104.5°
  • x
    =
    105.5°
  • x
    =
    103.5°
  • x
    =
    101.5°
Question 6
6.
If all the three angles of a triangle are of the same measure, find the measure of each of the angles.
  • 59°
  • 58°
  • 61°
  • 62°
  • 60°
Question 7
7.
Which of the following are measures of an isosceles right angled triangle ?
  • ∠A = 60° , ∠B = 60° , ∠C = 60°
  • ∠A = 45° , ∠B = 90° , ∠C = 45°
  • ∠A = 50.13° , ∠B = 73.62° , ∠C = 56.25°
  • ∠A = 94.94° , ∠B = 48.35° , ∠C = 36.71°
  • ∠A = 74.85° , ∠B = 49.32° , ∠C = 55.83°
Question 8
8.
Which of the following are measures of a right angled triangle ?
  • ∠I = 60° , ∠J = 60° , ∠K = 60°
  • ∠I = 78.46° , ∠J = 57.12° , ∠K = 44.42°
  • ∠I = 51.84° , ∠J = 90° , ∠K = 38.16°
  • ∠I = 100.8° , ∠J = 43.9° , ∠K = 35.3°
  • ∠I = 85.46° , ∠J = 52.89° , ∠K = 41.65°
Question 9
9.
In the following figure, one side of a triangle has been produced. Find all the angles of the triangle
  • F
    =
    62°
    ,
    G
    =
    45°
    ,
    H
    =
    73°
  • F
    =
    60°
    ,
    G
    =
    45°
    ,
    H
    =
    75°
  • F
    =
    58°
    ,
    G
    =
    45°
    ,
    H
    =
    77°
  • F
    =
    58°
    ,
    G
    =
    47°
    ,
    H
    =
    75°
  • F
    =
    60°
    ,
    G
    =
    43°
    ,
    H
    =
    77°
Question 10
10.
One angle of a triangle measures 60° and the other two angles are in the ratio 3 : 5. Find these angles.
  • B
    =
    43°
    ,
    C
    =
    73°
  • B
    =
    47°
    ,
    C
    =
    77°
  • B
    =
    44°
    ,
    C
    =
    74°
  • B
    =
    45°
    ,
    C
    =
    75°
  • B
    =
    46°
    ,
    C
    =
    76°