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Today I'm going to show you the 4 angle theorems, they're actually quite simple and I hope I can explain them clearly to you. If you want to support the channel, then share, subscribe, comment and like the videos! 0:00 Introduction 0:12 Secondary angle theorem 0:44 Vertex angle theorem 1:20 Step angle theorem 2:04 Alternate angle theorem #Angle theorem #Angle theorems