Answer:
40º
Step-by-step explanation:
Well, you can also use the definition of supplementary angles, where the angles always equal 180º. (its a straight line basically so something like <1 + <A = 180º)
Then 180º-40º=140º which is equal to <A and <D.
Since <D + <2 = 180º and <D = 140º,
then <2 = 40º
