# 8.5- Law of Sine and Law of Cosine

by Zoe, Snehita, and Clare

## This law is used on ASA, AAS, and SSA triangles.

The formula:

From

## "A" represents the angle, and "a" represents the side opposite angle "A

## This law is used on SAS, and SSS triangles.

From

## The lowercase letters represent the side lengths and the uppercase letter ("C") represents the angle opposite side "c".