1. What is the included angle between FO and OR?

1. What is the included angle between FO and OR?2. What is the included angle between FR and Fo?
3. What is the included angle between FR and RO?
4. What is the included side between 2F and ZR?
5. What is the included side between 20 and 2R?
6. What is the included side between F and 207​

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