Use the figure to solve triangle ABC Round lengths of sides to the nearest tenth and angle measures to the nearest degree A Round to the nearest degree as needed Round to the nearest degree as needed B C O Round to the nearest degree as needed Find the measures of the unknown sides of triangle ABC O b a Round the final answer to the nearest tenth as needed Round all intermediate values to the nearest thousandth as needed 17 36 4 21 2 27 B a 13 7