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CBSE Board Practice
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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade IX - Lines and Angles
Question
1
1.
Find the value of 'u' in the following figure
43°
53°
38°
48°
68°
Question
2
2.
Multiple lines drawn on a plane are called
parallel lines
coplanar lines
intersecting lines
concurrent lines
perpendicular lines
Question
3
3.
In the following figure, one side of a triangle has been produced. Find all the angles of the triangle.
I
=
58°
,
J
=
47°
,
K
=
75°
I
=
60°
,
J
=
43°
,
K
=
77°
I
=
60°
,
J
=
45°
,
K
=
75°
I
=
62°
,
J
=
45°
,
K
=
73°
I
=
58°
,
J
=
45°
,
K
=
77°
Question
4
4.
In the given figure, calculate the value of x.
x
=
21°
x
=
24°
x
=
20°
x
=
23°
x
=
22°
Question
5
5.
Which of the following are true?
a)
If
e
∥
f
and
f
∥
g
, then
e
∥
g
b)
If two lines are parallel to the same line, then they are parallel to each other
c)
If two lines are parallel to the same line, then they are perpendicular to each other
d)
If
e
⟂
f
and
f
⟂
g
, then
e
⟂
g
e)
If
e
⟂
f
and
e
⟂
g
, then
f
⟂
g
{d,b,a}
{a,b}
{c,a}
{d,b}
{e,c,a}
Question
6
6.
One of the two equal angles of an isosceles triangle measures 66°. Find the measure of each angle of the triangle.
A
=
64°
,
B
=
68°
,
C
=
48°
A
=
68°
,
B
=
66°
,
C
=
46°
A
=
64°
,
B
=
66°
,
C
=
50°
A
=
66°
,
B
=
66°
,
C
=
48°
A
=
66°
,
B
=
64°
,
C
=
50°
Question
7
7.
Find the interior alternate angles in the given figure
∠1 , ∠4 ; ∠2 , ∠3 ; ∠5 , ∠8 ; ∠6 , ∠7
∠1 , ∠2 ; ∠2 , ∠4 ; ∠4 , ∠3 ; ∠3 , ∠1 ; ∠5 , ∠6 ; ∠6 , ∠8 ; ∠8 , ∠7 ; ∠7 , ∠5
∠3 , ∠4 , ∠5 , ∠6
∠1 , ∠8 ; ∠2 , ∠7
∠3 , ∠6 ; ∠4 , ∠5
Question
8
8.
Calculate the value of the lettered angle in the following figure
x
=
55.04°
x
=
56.04°
x
=
54.04°
x
=
57.04°
x
=
53.04°
Question
9
9.
Which of the given figures is correct?
IV
II
III
I
Question
10
10.
Which of the following is a reflex angle?
111°
90°
71°
0°
339°
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