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In a quadrilateral ,
MATHEMATICS · Single correct · CBSE · Mathematics · Circles · Circles
Problem
In a quadrilateral
A
B
C
D
ABCD
A
B
C
D
,
∠
A
+
∠
C
=
180
∘
\angle A + \angle C = 180^{\circ}
∠
A
+
∠
C
=
18
0
∘
. What can you conclude from this information? (a)
A
B
∥
C
D
AB \parallel CD
A
B
∥
C
D
(b)
A
B
C
D
ABCD
A
B
C
D
is a parallelogram. (c)
A
B
C
D
ABCD
A
B
C
D
is a cyclic quadrilateral. (d)
A
C
⊥
B
D
AC \perp BD
A
C
⊥
B
D
Related theory
Cyclic Quadrilaterals
Circles
Cyclic quadrilateral properties
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