Question

solve it fastly and who will answer first I will mark as brainlest so answer first and give satisfied answer plz I request you ​

Answer 1

Answer:

Step-by-step explanation:

(i) we have ∠ABC= 40°

                  ∠BCD=20°+20°=40°

    => as ∠ABC=∠BCD  we can say them as alternate angles

     => AB║CD

(ii) we have ∠FEC= 160°

                    ∠ECD= 20°

   Now, ∠FEC+∠ECD= 160° + 20° = 180°

The sum of corresponding angles is 180°

=> EF║CD

(iii) From above,

   AB║CD  also CD║EF

  => AB║EF

  HENCE PROVED  :D