In the figure, show that AB||EF
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Step-by-step explanation:
in the figure angle ABC=70 and angle DCB=30+40=70
that means they are equal, when this going happen, when they are alternative angles
so AB||CD---Eq1
now same way angle DCE=40
and CEF=140 if you add these two you will get 180
that means it's satisfying the condition that the angles which are same side of transversal line are add up-to 180
so that means CD||EF---Eq2
from eq1 and eq2
we can say that AB||EF