How can I understand geometry in order to calculate the length of a circle?

Mathematics
Tutor: None Selected Time limit: 1 Day

Oct 30th, 2015

Thank you for the opportunity to help you with your question!

Inscribed angle=intercepted arc/2

For example m<NFI (Inscribed angle) and mNI  (intercepted arc)

So the righr answer is a: 102/2=51


Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 30th, 2015

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