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Byju's Answer
Standard IX
Mathematics
Opposite Sides of a Parallelogram Are Equal
In the above ...
Question
In the above figure RISK and CLUE are parallelograms, Find the value of x.
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Solution
Adjacent angles of a parallelogram are supplementary.
In parallelogram
R
I
S
K
,
∠
R
K
S
+
∠
I
S
K
=
180
∘
120
∘
+
∠
I
S
K
=
180
∘
∠
I
S
K
=
60
∘
Also, opposite angles of a parallelogram are equal.
In parallelogram
C
L
U
E
,
∠
U
L
C
=
∠
C
E
U
=
70
∘
The sum of the measures of all the interior angles of a triangle is
180
∘
.
x
+
60
∘
+
70
∘
=
180
∘
x
+
130
∘
=
180
∘
x
=
180
∘
−
130
∘
x
=
50
∘
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