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Mathematics
Mathematics
Problem
In a circle with centre
O
O
O
, a line segment
O
D
OD
O
D
is drawn perpendicular to chord
B
C
BC
B
C
at
D
D
D
. Which statement is always true? a)
∠
B
O
C
=
90
∘
\angle BOC = 90^{\circ}
∠
B
O
C
=
9
0
∘
b)
B
C
=
2
O
D
BC = 2\,OD
B
C
=
2
O
D
c)
B
D
=
D
C
BD = DC
B
D
=
D
C
d)
B
D
=
O
C
BD = OC
B
D
=
O
C
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