What is a name for the marked angle?

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I need this asap please!!!

Which expression is equivalent to the expression shown?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true