ICSE Board Practice

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ICSE Grade IX - Triangles
Question 1
1.
    • The line joining each vertex to the mid-point of the opposite side of a triangle is called
  • median
  • circumcentre
  • altitude
  • incentre
  • centroid
Question 2
2.
Which of the following are measures of an isosceles right angled triangle ?
  • ∠J = 106.73° , ∠K = 43.16° , ∠L = 30.11°
  • ∠J = 74.85° , ∠K = 49.32° , ∠L = 55.83°
  • ∠J = 60° , ∠K = 60° , ∠L = 60°
  • ∠J = 62.18° , ∠K = 55.64° , ∠L = 62.18°
  • ∠J = 45° , ∠K = 90° , ∠L = 45°
Question 3
3.
With the data in the given figure, △OPR ≅ △POQ by which property?
  • SSS Congruency
  • RHS Congruency
  • ASA Congruency
  • not congruent
  • SAS Congruency
Question 4
4.
Identify the property by which the two given triangles are congruent
  • SSS Congruency
  • ASA Congruency
  • RHS Congruency
  • SAS Congruency
Question 5
5.
Find the unknown marked angles in the following figure
  • x
    =
    90°
    ,
    y
    =
    115°
  • x
    =
    88°
    ,
    y
    =
    113°
  • x
    =
    89°
    ,
    y
    =
    114°
  • x
    =
    87°
    ,
    y
    =
    112°
  • x
    =
    91°
    ,
    y
    =
    116°
Question 6
6.
In below given figure, find ∠KHI
  • 80.03°
  • 78.03°
  • 77.03°
  • 79.03°
  • 76.03°
Question 7
7.
With the given data in the figure, △ABC ≅ △DCB by which property?
  • RHS Congruency
  • SSS Congruency
  • SAS Congruency
  • ASA Congruency
  • not congruent
Question 8
8.
In a right-angled triangle, the two acute angles are in the ratio 4 : 5. Find these angles.
  • A
    =
    42°
    ,
    C
    =
    52°
  • A
    =
    39°
    ,
    C
    =
    49°
  • A
    =
    38°
    ,
    C
    =
    48°
  • A
    =
    41°
    ,
    C
    =
    51°
  • A
    =
    40°
    ,
    C
    =
    50°
Question 9
9.
Which of the following are measures of an equilateral triangle ?
  • AB = 15 cm , BC = 11 cm , CA = 18.6 cm
  • AB = 13 cm , BC = 13 cm , CA = 18.38 cm
  • AB = 14 cm , BC = 14 cm , CA = 14 cm
  • AB = 13 cm , BC = 14 cm , CA = 12 cm
  • AB = 11 cm , BC = 13 cm , CA = 11 cm
Question 10
10.
Calculate the value of the lettered angle in the following figure
  • x
    =
    36.99°
  • x
    =
    34.99°
  • x
    =
    33.99°
  • x
    =
    32.99°
  • x
    =
    35.99°