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Mathematics
Mathematics
Problem
Lines
A
B
AB
A
B
and
C
D
CD
C
D
intersect at point
O
O
O
. If
∠
A
O
C
=
68
∘
\angle AOC = 68^{\circ}
∠
A
O
C
=
6
8
∘
, calculate the measures of
∠
C
O
D
\angle COD
∠
C
O
D
,
∠
D
O
B
\angle DOB
∠
D
O
B
, and
∠
B
O
A
\angle BOA
∠
B
O
A
.
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