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Mathematics
Mathematics
Problem
In quadrilateral
A
B
C
D
ABCD
A
B
C
D
,
∠
A
=
(
2
x
+
10
)
∘
\angle A = (2x + 10)^\circ
∠
A
=
(
2
x
+
10
)
∘
and
∠
C
=
(
4
x
−
10
)
∘
\angle C = (4x - 10)^\circ
∠
C
=
(
4
x
−
10
)
∘
. For
A
B
C
D
ABCD
A
B
C
D
to be cyclic, find the value of
x
x
x
. a)
25
25
25
b)
30
30
30
c)
40
40
40
d)
10
10
10
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