Question

In the figure, show that AB||EF​

Answer 1

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