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Byju's Answer
Standard VI
Mathematics
Angle
In the given ...
Question
In the given figure OA, OB are opposite rays and
∠
AOC +
∠
BOD =
90
0
, then
∠
COD is
A
90
0
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B
60
0
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C
45
0
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D
30
0
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Solution
The correct option is
A
90
0
A straight angle always measures
180
o
Given that,
∠
A
O
C
+
∠
B
O
D
=
90
o
But,
∠
A
O
C
+
∠
B
O
D
+
∠
C
O
D
=
180
o
(straight angle)
∴
∠
C
O
D
=
180
-
∠
A
O
C
+
∠
B
O
D
∴
∠
C
O
D
=
180
−
90
=
90
o
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1
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