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Homework QuestionsHomework Questions
Section 5.6Section 5.6Law of Cosines
Law of CosinesLaw of Cosines
Cabbac
Baccab
Abccba
cos2
cos2
cos2
222
222
222
Solve the TriangleSolve the TriangleA = 120°, b = 9, c = 5
A = a = B = b = C = c =
Solve the TriangleSolve the Trianglea = 24, b = 40, c = 18
A = a = B = b = C = c =
Solve the TriangleSolve the Trianglea = 11, b = 5, C = 20°
A = a = B = b = C = c =
Area of TrianglesArea of Triangles Area Formulas Heron’s Formula
where
CabA
BacA
AbcA
sin21
sin21
sin21
))()(( csbsassK
)(21 cbas
Find the area:Find the area:a = 82, b = 95, c = 72
Find the area:Find the area:a = 13, b = 15, c = 18
HomeworkHomeworkWorksheetP. 494 (17-20, 35-38)
Stickers: p. 494 (1-16, 29-34)