Asked by Landon
Use the image to answer the questionUse the inverse cosine to find the approximate interior angle measure at vertex A. round your answer to the nearest whole degree. (1 point)62°25°28°100° 17 15 8
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Use the Law of Cosines with the sides adjacent to A being 17 and 15 and the side opposite A = 8:
cos A = (17^2 + 15^2 − 8^2) / (2·17·15) = 450/510 = 15/17.
A = arccos(15/17) ≈ 28.1°, so rounded to the nearest degree A ≈ 28°.
cos A = (17^2 + 15^2 − 8^2) / (2·17·15) = 450/510 = 15/17.
A = arccos(15/17) ≈ 28.1°, so rounded to the nearest degree A ≈ 28°.
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