Select the correct answer from each drop-down menu. Given: Prove that three lines AD, CF, and BE are intersecting each other at the midpoint O. Complete the proof. It is given that ∠AOC = ∠BOC = 90°. By the vertical angles theorem, ∠AOC = ∠BOC. Therefore, ∠AOC = ∠BOC = 90°. By the transitive property of equality, ∠AOC = ∠BOC = ∠COB. After the application of the ________.
1) reflexive property of equality
2) symmetric property of equality
3) transitive property of equality
4) vertical angles theorem
