BQ# 1: Unit P Concepts 1-5

1. Law of Sines: In the Law of Sines, a proportion is set up and you can find an angle or a side of a non-right triangle. The Law of Sines works when you have the angle-side- angle triangle, angle-angle-side triangle, or side-side-angle. The pictures below will show how the Law of Sines is derived.

5. Area Formulas: The area formulas for non-right triangles are shown below with the angles of 35*-65*-80* and a base of 4. You will get the area to be 4.2 units squared for all three area formulas.

a)Using the "traditional" area formula:

b) Using the area of an oblique triangle:

c) Using the Heron's formula: