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Byju's Answer
Standard IX
Mathematics
Bisectors of Angles of a Parallelogram Form a Rectangle
In Figure, if...
Question
In Figure, if
P
Q
R
S
and
A
B
C
D
are parallelogram, find the value of
x
.
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Solution
In parallelogram
A
B
C
D
,
∠
B
=
∠
D
=
60
°
(
∵
Opposite angles in a parallelogram are equal
)
Now, in parallelogram
P
Q
R
S
,
∠
P
+
∠
S
=
180
°
(
∵
Adjacent angles in a parallelogram are supplementary
)
∴
∠
S
=
180
°
−
110
°
=
70
°
Now,
∠
Q
=
∠
S
=
70
°
(
∵
Opposite angles in a parallelogram are equal
)
Now, in
△
B
O
Q
,
∠
O
B
Q
+
∠
O
Q
B
+
∠
B
O
Q
=
180
°
(
Angle sum property of a triangle
)
∴
60
°
+
70
°
+
x
=
180
°
⇒
x
=
180
°
−
130
°
=
50
°
Hence the value of
x
is
50
°
.
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