Question

prove that AB is parallel to EF​

Answer 1

Answer:

angle ABC = 65°

angle BCD = 30°+35° = 65°

therefore AB||CD [alt. angle]__(1)

angle FEC + angle ECD = 35°+145°=180°

therefore EF||CD [co.int.angles]

AB||CD||EF

therefore AB||EF

Answer 2

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