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Byju's Answer
Standard IX
Mathematics
Linear Pair and Vertically Opposite Angles
Given, ∠ POR ...
Question
Given,
∠
P
O
R
=
3
x
and
∠
Q
O
R
=
2
x
+
10
∘
, find the values of
x
for which
P
O
Q
will be a line.
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Solution
Since,
P
O
Q
is a line
⇒
∠
Q
O
R
and
∠
P
O
R
are forming linear pair
⇒
∠
Q
O
R
+
∠
P
O
R
=
180
∘
⇒
3
x
+
2
x
+
10
∘
=
180
∘
⇒
5
x
=
180
∘
−
10
∘
⇒
x
=
170
∘
5
⇒
x
=
34
∘
Hence, the value of
x
is
34
∘
.
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Q.
In the given figure, ∠POR = 3x and ∠QOR = 2x + 10, find the value of x for which POQ will be a line.