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Problems
In quadrilateral
MATHEMATICS · Single correct · CBSE · Mathematics · Circles · Circles
Problem
In quadrilateral
A
B
C
D
ABCD
A
B
C
D
, it is known that
∠
A
C
B
=
∠
A
D
B
=
40
∘
\angle ACB = \angle ADB = 40^\circ
∠
A
C
B
=
∠
A
D
B
=
4
0
∘
and
∠
A
B
C
=
62
∘
\angle ABC = 62^\circ
∠
A
B
C
=
6
2
∘
. The measure of
∠
A
D
C
\angle ADC
∠
A
D
C
is (a)
140
∘
140^{\circ}
14
0
∘
(b)
78
∘
78^{\circ}
7
8
∘
(c)
118
∘
118^{\circ}
11
8
∘
(d)
138
∘
138^{\circ}
13
8
∘
Related theory
Cyclic Quadrilaterals
Circles
Cyclic quadrilateral properties
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