Q. 115.0( 1 Vote )
In the given figure, BAD || EF, ∠AEF = 55° and ∠ACB = 25°, find ∠ABC.
Answer :
According to question EF || BAD
Producing E to O, we get
EFA + 
AEO = 180 (Linear pair of angles)
AEO = 180 – 55
= 125
Now, in triangle ABC we get,
A = 125 and 
C = 25
So, 
ABC = 180 – (
A + 
C)
= 180 – (125 + 25)
= 180 – 150
= 30O
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