Question

No irrelevant answers pls​

Answer 1

Answer:

they form 180 angle

Step-by-step explanation:

if we extend line ED it becomes transversal between parallel EF and BC

Then angle ABC and angle EDB form co interior angle as BC is transversal to parallel AB and ED SUM OF CO INTERIOR ANGLR IS 180 DEGREE and we know that Angle EDB and angle DEF are equal due to alternate angle

therefore ABC PLUS DEF IS EQUAL TO 180