Answer:
Option (4)
Step-by-step explanation:
Vertical angles theorem;
"Two vertically opposite angles formed by the intersection of two straight lines are congruent"
By this theorem,
If ∠1 and ∠2 are the vertical angles Given
∠1 ≅ ∠2 Vertical angles theorem
Therefore, Option (4) is the correct option.
The reason for the step taken from the proof is vertical angles theorem.
Vertically opposite angles are equals.
Therefore,
if ∠1 and 2 are vertical angles, they are equal.
This means the angles are congruent and are the same.
Therefore,
∠1 ≅ ∠2 follows the vertical angle theorem
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