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!

We add the values of the angles starting from G to F as shown below:

GEF=110 + 40 +80

=230

The answer is C.230.

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

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