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Mathematics
Mathematics
Problem
Two parallel roads
A
B
AB
A
B
and
C
D
CD
C
D
are crossed by road
E
F
EF
E
F
. If the angle between
E
F
EF
E
F
and
A
B
AB
A
B
on the left side of
E
F
EF
E
F
is
110
∘
110^\circ
11
0
∘
, calculate the measure of the interior angle formed between
E
F
EF
E
F
and
C
D
CD
C
D
on the same side of
E
F
EF
E
F
. a) 80° b) 110° c) 70° d) 130°
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