7.2 The Cosine Law

Choose the version of the cosine law that will determine the side length  $f$  

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Choose the version of the cosine law that will determine the side length  $d$  

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Choose the version of the cosine law that will determine the side length  $e$  

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Choose the version of the cosine law that will determine  $\angle\ C$   (angle C)

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Choose the version of the cosine law that will determine  $\angle\ B$  (angle B)

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Use the cosine law to determine the length of  $c$  . Round the answer to the nearest tenth of the unit.

• 8.1 m

• 7.8 m

• 12.5 m

• 16.3 m

Determine the side length of  $d$  using the cosine law. Round your answer to the nearest tenth of a unit. 

• 4.6 feet

• 5.2 feet

• 3.9 feet

• 5.8 feet

Use the cosine law to determine the measure of  $\angle A$  (angle A). Round your answer to the nearest degree. 

• 38 degrees

• 46 degrees

• 35 degrees

• 54 degrees

Use the cosine law to determine the measure of  $\angle D$  (angle D). Round your answer to the nearest degree. 

• 17 degrees

• 23 degrees

• 12 degrees

• 21 degrees

Use the cosine law and the diagram provided to determine the distance between the two planes. Round your answer to the nearest unit.

• 83 miles

• 101 miles

• 93 miles

• 79 miles