CBSE Board Practice

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CBSE Grade IX - Lines and Angles
Question 1
1.
In a right-angled triangle, the two acute angles are in the ratio 2 : 1. Find these angles.
  • A
    =
    59°
    ,
    C
    =
    29°
  • A
    =
    61°
    ,
    C
    =
    31°
  • A
    =
    62°
    ,
    C
    =
    32°
  • A
    =
    58°
    ,
    C
    =
    28°
  • A
    =
    60°
    ,
    C
    =
    30°
Question 2
2.
Identify the figure below
  • line
  • angle
  • pentagon
  • circle
  • triangle
Question 3
3.
Find the interior alternate angles in the given figure
  • ∠3 , ∠6 ; ∠4 , ∠5
  • ∠1 , ∠2 , ∠7 , ∠8
  • ∠1 , ∠8 ; ∠2 , ∠7
  • ∠3 , ∠4 , ∠5 , ∠6
  • ∠1 , ∠4 ; ∠2 , ∠3 ; ∠5 , ∠8 ; ∠6 , ∠7
Question 4
4.
Find the value of m in the figure below
  • 18
  • 16
  • 19
  • 20
  • 22
Question 5
5.
Which of the following is an obtuse angle?
  • 360°
  • 321°
  • 90°
  • 46°
  • 105°
Question 6
6.
    • Find the complementary angles pair in the following
  • 70°,40°
  • 100°,60°
  • 50°,30°
  • 90°,50°
  • 60°,30°
Question 7
7.
Which of the following figures represent a ray?
  • fig 3
  • fig 1
  • fig 2
Question 8
8.
The following angle represents
  • reflex angle
  • right angle
  • acute angle
  • zero angle
  • straight angle
Question 9
9.
    • In the given figure, △BCD is a triangle in which ∠C = 68.77° and ∠D = 42.3°.
    • If 'z' is the angle between the bisector of ∠C and ∠D, then find z.
  • 126.47°
  • 123.47°
  • 124.47°
  • 125.47°
  • 122.47°
Question 10
10.
In  △ABC, if ∠A = 65° and ∠B = 56°, find the measure of ∠C
  • C
    =
    60°
  • C
    =
    59°
  • C
    =
    61°
  • C
    =
    57°
  • C
    =
    58°