Law of Sines

Oblique Triangles - Triangles that have no right angles.
As standard notation, the angles of a triangle are labeled A, B, C, and their opposite sides are labeled a, b, and c.

To solve an oblique triangle, you need to know at least one side and two other parts.
1. Two angles and any side (AAS or ASA) 
2. Two sides and an angle opposite one of them (SSA)
3. Three sides (SSS)
4. Two sides and their included angle (SAS)


Law of Sines

sinA=h/r -> h=b(sinA)         

sinB=h/a -> h=a(sinB)

 =

or

Find X

Area of an oblique triangle

i.e. 

Homework: Section 6.1 #4, 6, 24, 29, 38, 40, 52