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Problems
Mathematics
Mathematics
Problem
Angles
m
∠
C
D
E
=
98
∘
m\angle CDE = 98^{\circ}
m
∠
C
D
E
=
9
8
∘
and
m
∠
E
D
F
=
77
∘
m\angle EDF = 77^{\circ}
m
∠
E
D
F
=
7
7
∘
are adjacent. Can we conclude that points
C
,
D
C, D
C
,
D
and
F
F
F
are collinear? Give reason.
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