Answer:
180°, ∠4, ∠5
Step-by-step explanation:
∠1+∠2+∠3 = 180° because, as seen, their sum makes a straight angle. (on the transversal E)
∠2 is equal to ∠4 because of the Alternate Interior Angles theorem
∠1 is equal to ∠5 because of the Corresponding Angles theorem
