Here are the formulas needed for this section. Keep in mind that these are for triangles that are NOT right triangles (they are wrong😆).

This is a great video about the Law of Cosines. Keep in mind that SSS stands for Side-Side-Side, meaning all three corresponding sides of the triangles are equal in length. SAS stands for Side-Angle-Side, which requires two corresponding sides and the included angle (the angle between them) to be equal.