22
QuizMultiple Choice
Area and Perimeter of Triangles — Unit test
Question 22 of 25 • OH-Geometry B
Law of cosines: a2 = b2 + c2 – 2bccos(A)
Answer
A
62 = p2 + 82 – 2(p)(8)cos(39°)B
p2 = 62 + 82 – 2(6)(8)cos(39°)C
82 = 62 + p2 – 2(6)(p)cos(39°)D
p2 = 62 + 62 – 2(6)(6)cos(39°)