Question

in the given figure, show that AB||EF​

Answer 1

Answer:

As angle abc is equal to angle BCD (alternate interior angles)

So AB || CD. equation 1

and now the sum of angle FEC and angle ECD is equal to 180 degrees (adjacent angles)

So EF || CD. equation 2

From equation 1 and equation 2

AB||EF

Hence proved...

Step-by-step explanation:

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Answer 2

Refer to above attachment for the proof.

Hope it helps...