The Law of Cosines

Given the triangle: A=50°, b=5, c=2. Find missing length side a

• 3.12

• 4.02

• 14.12

• 28.24

Solve the triangle

• b=2.95 , A=28.7 , C=106.3

• b= 2.95, A= 30.6, C=108.43

• b=0.67 , A=28.7 , C=105.78

• b=4.95 , A= 21, C=106

Find the missing side.

• 15.9 in.

• 22.8 in.

• 19.2 in.

• 521.1 in.

Solve the Triangle

a=38, b= 31, c= 35

Find <A, <B and <C

• A= 43°, B= 47°, C= 90°

• A= 70°, B= 50.1°, C= 59.9°

• A= 50.1°, B= 70°, C= 59.9°

• A= 60°, B= 70°, C= 50°

If three sides of a triangle are given, the Law of ____ is used to solve the triangle.

• Cosines

• Sines

• Tangent

• Cosecents

Find XZ

• 16.004 meters

• 544.165 meters

• 34.7 meters

• 1204.165 meters

To approximate the length of a marsh, a surveyor walks 425 meters from point A to point B. Then the surveyor turns 65º and walks 300 meters to point C. Approximate the length AC of the marsh.

• 250

• 615

• :)

• Not me

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

Choose the Law of Cosine you would use to solve the problem.

• Not enough Info