In the figure transversal cuts two lines m and n. If 1 = 110°, 5 = 70°. Find 2, 3 and 4. Show that m || n
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⇒ ∠7=∠5 [ Vertically opposite angles ]
∴ ∠5=65
o
⇒ ∠4=110
o
Now,
⇒ ∠4+∠5=110
o
+65
o
⇒ ∠4+∠5=175
o
But these are the consecutive interior angles which are not supplementary.
∴ m is not parallel to n
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