Law of Sines Law of Cosine

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Gravity

Find the exact area of the triangle

• 13.9 in²

• 13.8 in²

• 14.0 in²

• 27.9 in²

If you know the lengths of three sides to a triangle, what formula can you use to find an angle measure?

• Law of Sine

• Law of Cosine

• Law of Tangent

• Law of Sign

If you know the lengths of two sides and the angle between them, use this formula to find the side opposite the angle you know.

• Law of Sign

• Law of Cosine

• Law of Tangent

• Law of Sine

What is the length of side x?

• 130 cm

• 112 cm

• 150 cm

• 105 cm

Solve the Triangle
B= 85°, C= 47°, and a=19
Find A, b, and c

• A= 48°, b=25.5, c= 17.8

• A= 48°, b= 19.5, c= 23.4

• A= 90°, b= 14, c= 23.6

• A= 39°, b= 19, c= 19√2

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°

What is the measure of angle A?

Find the length of Side BC.

Two stakes are holding a small blimp in place. Stake A measures an angle of elevation of 49^o and Stake B measures an angle of elevation of 58^o. If the string attached to Stake A has a length of 148 feet, what is the length of the string attached to Stake B? Round to the nearest tenth.