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Byju's Answer
Standard VIII
Mathematics
Elements of a Parallelogram
Find the valu...
Question
Find the value of
x
,
y
and
z
from the given parallelograms.
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Solution
∠
P
Q
R
+
e
x
t
.
∠
Q
=
180
∘
[Linear pair]
∠
P
Q
R
+
80
∘
=
180
∘
⇒
∠
P
Q
R
=
100
∘
x
+
100
∘
=
180
∘
[Supplementary angles of parallelogram]
x
=
80
∘
In
△
P
S
R
,
Z
=
∠
S
R
P
[Alternate angles]
∴
80
∘
+
60
∘
+
Z
=
180
∘
⇒
Z
=
180
∘
−
140
∘
=
40
∘
In
△
P
Q
R
,
40
∘
+
y
+
100
∘
=
80
∘
y
=
180
∘
−
140
∘
=
40
∘
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