What is does the curve on top of EB in the picture mean?
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Chord maybe? Just a guess. – John Alexiou May 12 '17 at 00:28
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1Perhaps if you include the whole image (the surrounding context) it would be easier to know. – JRN May 12 '17 at 00:34
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4I'd say arc... – lhf May 12 '17 at 00:34
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Yeah, my best guess is the arclength from E to B. – BSplitter May 12 '17 at 00:36
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1It's the measure of the central angle (in this case, in degrees) associated with that arc. But be careful, there are two possible arcs, so you need more context to tell which. The sum of the degree measures of the two arcs is always equal to $360^\circ$. – quasi May 12 '17 at 00:44
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Here is the picture in the answer section: – BarryAllen May 12 '17 at 00:51
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I may be wrong, but in the equation image, I think that the "-" should be "=". – Somos May 12 '17 at 01:25