Question

One more guys??##...Ans....​

Answer 1

Step-by-step explanation:

1.

angle ABC = 40°

angle BCD = 20° + 20°= 40°

angle ABC = angle BCD

Hence AB || CD by alternate angle test.

2.

angle FEC + angle ECD

= 160 + 20 = 180°

hence CD || EF by interior angle test for parallel lines.

3.

AB || CD

CD || EF

therefore AB || EF

Answer 2

Answer:

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Step-by-step explanation:

done