Question

Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.

Answer 1

Answer:

• A) A = 27.3°, B = 56.1°, C = 96.6°

Step-by-step explanation:

Use the Law of Cosines:

• A = arccos [(b² + c² - a²)/(2bc)] = arccos [(13.2² + 15.8² - 7.3²)/(2*13.2*15.8)] = 27.3°
• B = arccos [(a² + c² - b²)/(2ac)] = arccos [(7.3² + 15.8² - 13.2²)/(2*7.3*15.8)] = 56.1°
• C = 180° - (A + B) = 180° - (27.3° + 56.1°) = 96.6°

Correct choice is A.