If AB ll CD ll EF, find the value of (y-x) : (y+x). Class 9th
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answer..
y+50=180
∘
(∵Sumofinteriorangles=180
∘
)
⟹y=130
∘
x+30=110
∘
(alternateangles)
⟹x=80
∘
∴
y−x
y+x
=
130−80
130+80
=
50
210
=
5
21
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