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Byju's Answer
Standard VIII
Mathematics
Angle Sum Property of a Polygon
If LO || MN...
Question
If
L
O
|
|
M
N
, find the value of
p
.
A
50
∘
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B
46
∘
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C
56
∘
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D
52
∘
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Solution
The correct option is
C
56
∘
Here
△
L
M
N
is right angle triangle.
And
∠
N
L
M
+
∠
L
M
N
+
∠
M
N
L
=
180
o
.....[Angle sum property]
59
o
+
90
o
+
∠
M
N
L
=
180
o
∠
M
N
L
=
180
o
−
149
o
=
31
o
.
Given,
∠
L
N
O
=
25
o
.
So,
∠
M
N
O
=
∠
M
N
L
+
∠
L
N
O
=
31
o
+
25
o
=
56
o
.
As $
LO || MN
a
n
d
ON6$ is crossing both the lines so,
∠
M
N
O
=
∠
p
=
56
o
....[Alternate Interior angles]
Hence, option
C
is correct.
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0
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