Math 11 Chapter 2 Lesson 4: Two parallel planes

Math 11 Chapter 2 Lesson 4: Two parallel planes 1. Summary of theory 1.1. Define Two planes (left( alpha right)), (left( beta right)) are said to be parallel if they have nothing in common. Sign: (left( alpha right)) // (left( beta right)) nice (left( beta right)) // (left( alpha right)). 1.2. Nature – Theorem 1: …

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