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Mathematics
Mathematics
Problem
Lines
l
l
l
and
m
m
m
intersect at point
S
S
S
. One angle is
(
2
x
+
10
)
∘
(2x + 10)^\circ
(
2
x
+
10
)
∘
and the angle adjacent to it is
(
3
x
−
40
)
∘
(3x - 40)^\circ
(
3
x
−
40
)
∘
. Which of the following correctly classifies the angle vertically opposite to
(
3
x
−
40
)
∘
(3x - 40)^\circ
(
3
x
−
40
)
∘
? a) Right b) Obtuse c) Acute d) Straight
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