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Mathematics
Mathematics
Problem
In trapezium
A
B
C
D
ABCD
A
B
C
D
,
A
B
∥
C
D
AB \parallel CD
A
B
∥
C
D
and
A
D
=
B
C
AD = BC
A
D
=
B
C
. Which of the following statements is always true? a)
A
C
⊥
B
D
AC \perp BD
A
C
⊥
B
D
b)
∠
A
=
∠
C
\angle A = \angle C
∠
A
=
∠
C
c)
A
C
=
B
D
AC = BD
A
C
=
B
D
d)
A
D
=
A
B
AD = AB
A
D
=
A
B
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