Consider circle O below. The length of arc BA is 8.4 cm and the length of the radius is 8 cm. The measure of angle AOC is 45°.

Question

Consider circle O below. The length of arc BA is 8.4 cm and the length of  the radius is 8 cm. The measure of  angle AOC is 45°. Rounded to the nearest whole degree, what is the measure of angle BOA? Rounded to the nearest tenth of a centimeter, what is the length of arc BAC?

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