Question

plz plz plz help me. give answer with full explanation. I will mark as brainliest and will follow u.!!!!!!!!! ​

Answer 1

Step-by-step explanation:

if angle ABC =angle BCD(alternate angles) then AB||CD, so we can see clearly that 40°=20°+20° hence AB||CD, so (a) part is done

if angle ECD+angle CEF=180°(angles on same side of transverse are Supplementary) then EF||CD so,

clearly we see 160°+20°=180° hence EF||CD

now, as AB||CD

EF||CD

=>AB||EF