Law of Cosines Introduction

What are the possible criteria for the Law of Cosines?

• SSA, SSS

• SSA, ASA

• SSS, SAS

• AAS, ASA

Which law would you use?

• Law of Sines

• Law of Cosines

• 12.7

• 13.1

• 13.6

• 14.2

• 14.5

• 15.1

• 15.8

• 16.7

Would you use the Law of Sines

or the Law of Cosines?

• Law of Sines

• Law of Cosines

Would you use the Law of Sines

or the Law of Cosines?

• Law of Sines

• Law of Cosines

A triangle with two sides that measure 6 m and 8 m with an included angle of 137°.

• 17.8m²

• 14.6m²

• 16.4m²

• 12.9m²