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Byju's Answer
Standard X
Mathematics
Chord Properties of Circles
In the given ...
Question
In the given figure,
∠
A
B
D
=
70
o
,
∠
A
D
B
=
30
o
. Then
∠
B
C
D
is __________.
A
90
o
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B
80
o
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C
100
o
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D
120
o
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Solution
The correct option is
D
100
o
∠
B
A
D
=
180
−
(
∠
A
D
B
+
∠
A
B
D
)
=
180
−
30
−
70
=
80
o
∠
B
A
D
and
∠
B
C
D
are supplementary angles.
∴
∠
B
C
D
=
180
o
−
∠
B
A
D
=
180
−
80
=
100
o
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1
Similar questions
Q.
In the figure,
A
B
C
D
is a cyclic quadrilateral.. If
∠
B
C
D
=
100
o
and
∠
A
B
D
=
70
o
, find
∠
A
D
B
.
Q.
Which of the following is the correct match with respect to the given question ?
'ABCD' is a rhombus such that
∠
A
C
B
=
40
o
then
∠
A
D
B
=
____.
70
o
As
∠
A
D
B
=
1
/
2
(
180
o
−
40
o
)
45
o
∠
C
+
∠
D
=
90
o
50
o
∠
B
C
D
=
80
o
⇒
∠
A
D
C
=
100
o
∴
∠
A
D
B
=
(
1
/
2
)
x
100
o
60
0
All sides are equal
Q.
In the figure at right, ABCD is a cyclic quadrilateral in which
∠
B
C
D
=
100
o
and
∠
A
B
D
=
50
o
find
∠
A
D
B
Q.
In the given figure,
∠
A
B
D
=
90
o
,
∠
B
D
A
=
30
o
and
∠
B
C
A
=
20
o
. What is
∠
C
A
D
?
Q.
In the given figure,
∠
A
B
D
=
70
∘
,
∠
A
D
B
=
30
∘
.Then
∠
B
C
D
is
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