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!

The right answer is D. 

The two segments are equal. So 5x-7=3x+5

5x-3x=7+5

2x=12

x=12/2

x=6

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

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