B are supplementary angles.
6. Lines l, and l, intersect at O. Find the value of x, y
and
2
2
40°
o
2 영
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Answer:
Given, x=45
o
As per the diagram, two lines l
1
& l
2
intersected to form two pairs of vertically opposite angles.
x=z -- (1)
u=y --(2)
From (1)
x=z=45
o
.
We also know that the sum of all the angles around a point is 360
o
x+u+z+y=360
o
45+u+45+u=360
o
90+2u=360
o
2u=270
o
u=135
o
=>y=135
o
∴ x=45
o
,z=45
o
,u=135
o
and y=135
o
Explanation:
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