The information below refers to triangle ABC . cm Find all the missing parts. Apply the rules regarding the use of significant digits after all computations are complete.

A)
B)
C)
D)

Question

The information below refers to triangle ABC .   cm ​Find all the missing parts. Apply the rules regarding the use of significant digits after all computations are complete.
​
A)​ 
B)​ 
C)​ 
D)​

Quizplus · Accepted Answer

Using the Pythagorean theorem, we can find that $AB$ is approximately 10.25 cm. Then, using the Law of Cosines, we can find that $\angle A$ is approximately 35.5 degrees, $\angle C$ is approximately 71.5 degrees, and $BC$ is approximately 7.80 cm. Using the Law of Sines, we can find that $AC$ is approximately 18.7 cm. The final answer should have three significant digits, so the only option that satisfies this is D.

The Information Below Refers to Triangle ABC