△def
df = ef

prove:
∠3 = ∠4

which of the following statements would be the reason in line 4 of the proof?

Given:

In Δ DEF, ∠3=∠4.

To prove:→ DE=E F

Proof:

1.  ∠3=∠4[Given]

2. →∠1 and ∠ 3 are Supplementary to each other.

(a)⇒∠1 + ∠ 3=180°

 →∠2 and ∠ 4 are also Supplementary to each other.

(b)⇒∠2 + ∠ 4=180°

                                    [Exterior sides in opposite rays]

3. From 1 , a and b

 ⇒∠ 1 = ∠ 2[Two Angles Supplementary to equal Angles are equal to each other]

4.

 If two angles of a Triangle are equal , then side opposite to these angles are equal.

she gotta workk that a 2

step-by-step explanation: